317731875817 has 2 divisors, whose sum is σ = 317731875818. Its totient is φ = 317731875816.

The previous prime is 317731875767. The next prime is 317731875863. The reversal of 317731875817 is 718578137713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316576147801 + 1155728016 = 562651^2 + 33996^2 .

It is a cyclic number.

It is not a de Polignac number, because 317731875817 - 2¹¹ = 317731873769 is a prime.

It is not a weakly prime, because it can be changed into another prime (317731875017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158865937908 + 158865937909.

It is an arithmetic number, because the mean of its divisors is an integer number (158865937909).

Almost surely, 2^317731875817 is an apocalyptic number.

It is an amenable number.

317731875817 is a deficient number, since it is larger than the sum of its proper divisors (1).

317731875817 is an equidigital number, since it uses as much as digits as its factorization.

317731875817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6914880, while the sum is 58.

The spelling of 317731875817 in words is "three hundred seventeen billion, seven hundred thirty-one million, eight hundred seventy-five thousand, eight hundred seventeen".