317085997 has 2 divisors, whose sum is σ = 317085998. Its totient is φ = 317085996.

The previous prime is 317085973. The next prime is 317086031. The reversal of 317085997 is 799580713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230614596 + 86471401 = 15186^2 + 9299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317085997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317085997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317085497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158542998 + 158542999.

It is an arithmetic number, because the mean of its divisors is an integer number (158542999).

Almost surely, 2^317085997 is an apocalyptic number.

It is an amenable number.

317085997 is a deficient number, since it is larger than the sum of its proper divisors (1).

317085997 is an equidigital number, since it uses as much as digits as its factorization.

317085997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 317085997 is about 17806.9086873606. The cubic root of 317085997 is about 681.9078465281.

The spelling of 317085997 in words is "three hundred seventeen million, eighty-five thousand, nine hundred ninety-seven".