
© Ecelop/ShutterstockOne nice thing about favorite numbers is that there are so many to choose from.
Go ahead, admit it. Like a lot of people, you have a favorite number.
Maybe you're not as extreme as Sheldon Cooper, the arch-nerd character on television's
Big Bang Theory,
who loves the number 73: "73 is the 21st prime number, its mirror 37 is the 12th and its mirror 21 is the product of multiplying, hang on to your hats, 7 and 3!"
Maybe your favorite number is your birthday, or the jersey you wore in high school. Or maybe it is your significant other's birthday. (That would be smart, because then you would never forget it.)
But what is the world's favorite number?
Alex Bellos, a mathematics blogger for
The Guardian, started collecting favorite numbers a few years ago. One of the most frequent questions he got from readers was, "What's your favorite number?" (Or "favourite," since this was in England.) He didn't actually have one, but then he started asking readers the same question. Quite to his surprise, he found that a lot of people were passionate about numbers... or at least one number in particular.
"Numbers are like gold coins—you might see a lot of them, but they're all wonderful."
Bellos set up
the website and asked people to cast votes for their favorite numbers and explain why they liked them. More than 44,000 people did. Along the way, Bellos noticed lots of patterns. "Definitely, non-mathematical reasons were more frequent than mathematical ones," he says. "Dates and birthdays are the most common." Odd numbers do better, in general, than even ones. In China, 8 is popular because it sounds like "prosperity," and 4 is unpopular because it sounds like "death." English has sound-alikes, too: one voter said his favorite was 11, because "it sounds like lovin'."
Round numbers, ending in 0 or 5, are quite unpopular. "My theory, which is not scientifically proven, is that we use round numbers to mean approximate things," says Bellos. "When we say 100, we don't usually mean exactly 100, we mean around 100. So 100 seems incredibly vague. Why would you have something as your favorite that is so vague?" It seems that we like our numbers to be somewhat unique, which may be why prime numbers are popular. They aren't divisible by any smaller numbers (aside from 1).
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