563

This number is a prime.

The largest known Wilson prime.

Reggie Jackson hit 563 home runs in his professional baseball career. He led his teams to five world championships and eleven division titles.

As Pierre Cami points out, this is the smallest prime with a twin Carmichael number, since 563 - 2 = 561 is the first Carmichael number. [Post]

The smallest prime happy number with a prime happy numbered index. [Goelz]

Popular Mechanics sells "The Pocket Genius: 563 Facts That Make You the Smartest Person in the Room."

Two to the power 563 is the smallest power of 2 that contains all twenty-five one and two-digit primes. [Gaydos]

The smallest prime that can be represented as sum of squares of first n successive numbers ending with the same digit, i.e., 1^2+11^2+21^2, (n=3). [Loungrides]

The Buddha was born in the year 563 B.C. at a place called Lumbini.

Only distinct-digit Honaker number which does not share any digit with its corresponding distinct-digit Honaker prime. [Gupta]

The Galápagos Islands are located 563 miles west of continental Ecuador.