317899931 has 2 divisors, whose sum is σ = 317899932. Its totient is φ = 317899930.

The previous prime is 317899867. The next prime is 317899957. The reversal of 317899931 is 139998713.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317899931 - 2⁶ = 317899867 is a prime.

It is a super-2 number, since 2×317899931² = 202120732259609522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 317899931.

It is not a weakly prime, because it can be changed into another prime (317899991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158949965 + 158949966.

It is an arithmetic number, because the mean of its divisors is an integer number (158949966).

Almost surely, 2^317899931 is an apocalyptic number.

317899931 is a deficient number, since it is larger than the sum of its proper divisors (1).

317899931 is an equidigital number, since it uses as much as digits as its factorization.

317899931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 50.

The square root of 317899931 is about 17829.7484839243. The cubic root of 317899931 is about 682.4908153531.

The spelling of 317899931 in words is "three hundred seventeen million, eight hundred ninety-nine thousand, nine hundred thirty-one".