917

917 = 7 x 131.

917 is the only positive number known whose ninth power can be written as a sum of 10 ninth powers.

917 is the sum of five consecutive primes: 917 = 173 + 179 + 181 + 191 + 193.

917 is a number divisible by the sum of the squares of its digits: 9² + 1² + 7² = 131.

The Porsche 917 is a racing car that gave its manufacturer its first overall wins in the 24 Hours of Le Mans race.

Source: What's Special About This Number?