Lucky Numbers Around the World: Why Cultures Disagree

A World of Lucky and Unlucky Numbers

Walk into any casino in Las Vegas and you will see the number 7 everywhere — on slot machines, neon signs, and advertising. Fly to Beijing and you will notice the number 8 displayed prominently on storefronts, license plates, and phone numbers. Visit a hospital in Tokyo and you may find there is no room number 4 on any floor.

Numbers carry meaning far beyond mathematics. Across cultures, certain numbers are considered lucky or unlucky with a passion that influences architecture, business decisions, real estate prices, and daily life. The differences are striking, and the psychology behind them reveals how deeply culture shapes our perception of fortune.

Seven: The West's Favorite Number

In Western cultures, 7 is overwhelmingly considered the luckiest number. When researcher Alex Bellos conducted a global survey asking people to name their favorite number, 7 won by a landslide — nearly 10% of respondents chose it, far more than any other number.

The roots of seven's lucky status run deep. There are seven days of the week, seven classical planets visible to the naked eye, seven notes in the musical scale, seven colors of the rainbow, and seven continents. In Christianity, God rested on the seventh day. In Judaism, the menorah has seven branches. Ancient Greek and Roman traditions similarly elevated seven as a number of completeness and perfection.

Psychologically, research by cognitive scientists suggests that 7 occupies a special place in human cognition. George Miller's famous 1956 paper "The Magical Number Seven, Plus or Minus Two" demonstrated that short-term memory typically holds about seven items. Whether this cognitive prominence contributes to its lucky status or is merely coincidence remains debated.

Eight: China's Number of Prosperity

In Chinese culture, 8 is the supreme lucky number. The reason is primarily linguistic: the Mandarin word for eight, "ba," sounds similar to "fa" in "facai," which means "to prosper" or "to generate wealth." This phonetic association has made 8 extraordinarily desirable across Chinese-speaking communities.

The cultural weight of this belief was displayed spectacularly when the Beijing Olympics chose to begin at 8:08 PM on August 8, 2008 (08/08/08). This was not a coincidence — the date and time were deliberately selected for maximum auspiciousness. The opening ceremony drew an estimated 4 billion viewers worldwide.

In Chinese real estate markets, apartments on the 8th floor command premiums of 8-10% over comparable units on other floors, according to research by Shum, Sun, and Ye (2014) published in Management Science. Phone numbers containing multiple 8s sell for extraordinary sums — a Hong Kong phone number with the sequence 8888-8888 once sold for over $270,000 at auction.

Businesses time their launches, signings, and openings to dates containing 8. Vehicle license plates with 8s cost more at auction. The pervasiveness of this belief demonstrates how a linguistic association can shape economic behavior on a massive scale.

Four: The Number of Death in East Asia

While 8 brings good fortune in East Asian cultures, 4 brings dread. In Mandarin, Cantonese, Japanese, and Korean, the word for four is phonetically similar to the word for "death." In Mandarin, four is "si" (fourth tone), which is nearly identical to "si" (third tone) meaning "death." In Japanese, "shi" means both four and death.

This fear of four — called tetraphobia — has concrete architectural consequences. Many buildings in China, Japan, South Korea, and Taiwan skip the 4th floor entirely, jumping from 3 to 5. Some buildings also omit floors 14, 24, 34, and any other floor containing the digit 4. In extreme cases, a building might skip floors 4, 13, 14, 24, 34, 40-49, and 54, losing dozens of floor numbers.

Hospitals in Japan and China frequently avoid room number 4, particularly in maternity and intensive care wards. Nokia and other electronics manufacturers have historically avoided model numbers containing 4 for products sold in East Asian markets. The Taiwan Power Company reportedly skipped all telephone numbers containing 4 when assigning new lines.

Research published in the British Medical Journal by Phillips, Liu, and Zhang (2001) found a measurable health impact: cardiac mortality among Chinese and Japanese Americans was 7% higher on the 4th of each month compared to other days. The researchers attributed this to the psychological stress of tetraphobia — a remarkable demonstration of how cultural superstition can affect physical health outcomes.

Thirteen: Europe's Unlucky Number

In the Western world, 13 is the most widely feared number, a phobia known as triskaidekaphobia. The origins are debated: some trace it to the 13 guests at the Last Supper (with Judas as the 13th), others to Norse mythology where Loki, the 13th guest at a dinner in Valhalla, caused the death of Baldur.

The practical consequences are significant. Over 80% of high-rise buildings in the United States skip the 13th floor, labeling it as 14 instead. Many airports lack a Gate 13. Hospitals commonly have no Room 13. The Italian airline Alitalia has no row 13. Some streets skip the address number 13.

Friday the 13th amplifies the superstition further. Research estimates that businesses in the United States lose $800-900 million on each Friday the 13th because people avoid travel, purchases, and business deals. This represents a measurable economic impact of a belief with no mathematical basis whatsoever.

Three: Lucky Across Many Cultures

The number 3 holds positive associations across an unusually wide range of cultures. In Slavic traditions, three is deeply lucky and appears constantly in folklore: three wishes, three brothers, three trials. Russian fairy tales are structured around the "rule of three" so consistently that folklorist Vladimir Propp identified it as a fundamental narrative element.

In Christianity, the Holy Trinity gives 3 sacred significance. In Hinduism, the Trimurti (Brahma, Vishnu, Shiva) represents creation, preservation, and destruction. In Chinese culture, 3 is lucky because it sounds like the word for "alive" or "birth."

The psychological appeal of three may be cognitive as well as cultural. Three is the smallest number that creates a pattern, and humans are deeply drawn to patterns. "Three strikes and you're out," "life, liberty, and the pursuit of happiness," "ready, set, go" — our language itself is structured around threes.

How Number Beliefs Shape Economics

The economic impact of lucky and unlucky numbers extends far beyond anecdote. Academic research has documented measurable effects in several domains:

Real estate: Studies of housing markets in areas with large Chinese populations have found that homes with the number 8 in the address sell for a premium of 2-3%, while homes with 4 in the address sell at a discount. A study by Bourassa and Peng (1999) documented this effect in New Zealand neighborhoods with significant Chinese populations.

Stock markets: Research has found that stock prices on the Hong Kong and Shenzhen exchanges cluster around values containing 8 and avoid values containing 4. Initial public offering prices are disproportionately set at amounts containing lucky numbers.

Product pricing: Companies marketing to Chinese consumers preferentially price products at amounts containing 8 — $8.88, $88, $888 — with measurable effects on sales.

The Psychology Behind Number Superstitions

Why do number superstitions persist despite their obvious irrationality? Cultural psychologists point to several mechanisms.

Linguistic determinism plays a significant role — when a number sounds like a positive or negative word, the association becomes automatic and difficult to override, even when people intellectually recognize the connection is arbitrary.

Social conformity reinforces number beliefs. When everyone around you treats 4 as unlucky, behaving as if it is neutral carries social risk. Buying the apartment on the 4th floor is cheaper, but reselling it may be difficult if the next buyer also avoids 4.

Risk aversion under uncertainty also contributes. When outcomes are uncertain, people grasp at any available heuristic, including culturally transmitted number beliefs. The cost of avoiding an "unlucky" number is typically small, while the perceived cost of ignoring the superstition — even if only psychological — can feel large.

Understanding these cultural differences is not just academically interesting. In an increasingly globalized world, awareness of number symbolism across cultures is practically useful for business, architecture, marketing, and cross-cultural communication. The numbers themselves are neutral — but the meanings we attach to them are anything but.