315740857 has 2 divisors, whose sum is σ = 315740858. Its totient is φ = 315740856.

The previous prime is 315740851. The next prime is 315740891. The reversal of 315740857 is 758047513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216060601 + 99680256 = 14699^2 + 9984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315740857 is a prime.

It is not a weakly prime, because it can be changed into another prime (315740851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157870428 + 157870429.

It is an arithmetic number, because the mean of its divisors is an integer number (157870429).

Almost surely, 2^315740857 is an apocalyptic number.

It is an amenable number.

315740857 is a deficient number, since it is larger than the sum of its proper divisors (1).

315740857 is an equidigital number, since it uses as much as digits as its factorization.

315740857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 315740857 is about 17769.0983732996. The cubic root of 315740857 is about 680.9422182109.

The spelling of 315740857 in words is "three hundred fifteen million, seven hundred forty thousand, eight hundred fifty-seven".