315972017 has 2 divisors, whose sum is σ = 315972018. Its totient is φ = 315972016.

The previous prime is 315971989. The next prime is 315972089. The reversal of 315972017 is 710279513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311310736 + 4661281 = 17644^2 + 2159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315972017 is a prime.

It is not a weakly prime, because it can be changed into another prime (315971017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157986008 + 157986009.

It is an arithmetic number, because the mean of its divisors is an integer number (157986009).

Almost surely, 2^315972017 is an apocalyptic number.

It is an amenable number.

315972017 is a deficient number, since it is larger than the sum of its proper divisors (1).

315972017 is an equidigital number, since it uses as much as digits as its factorization.

315972017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 315972017 is about 17775.6017338373. The cubic root of 315972017 is about 681.1083546715.

The spelling of 315972017 in words is "three hundred fifteen million, nine hundred seventy-two thousand, seventeen".