317390813 has 2 divisors, whose sum is σ = 317390814. Its totient is φ = 317390812.

The previous prime is 317390789. The next prime is 317390849. The reversal of 317390813 is 318093713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300432889 + 16957924 = 17333^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 317390813 - 2¹⁰ = 317389789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317390873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158695406 + 158695407.

It is an arithmetic number, because the mean of its divisors is an integer number (158695407).

Almost surely, 2^317390813 is an apocalyptic number.

It is an amenable number.

317390813 is a deficient number, since it is larger than the sum of its proper divisors (1).

317390813 is an equidigital number, since it uses as much as digits as its factorization.

317390813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 317390813 is about 17815.4655566449. The cubic root of 317390813 is about 682.1262834351.

The spelling of 317390813 in words is "three hundred seventeen million, three hundred ninety thousand, eight hundred thirteen".