315958891 has 2 divisors, whose sum is σ = 315958892. Its totient is φ = 315958890.

The previous prime is 315958871. The next prime is 315958897. The reversal of 315958891 is 198859513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315958891 - 2⁷ = 315958763 is a prime.

It is not a weakly prime, because it can be changed into another prime (315958897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157979445 + 157979446.

It is an arithmetic number, because the mean of its divisors is an integer number (157979446).

Almost surely, 2^315958891 is an apocalyptic number.

315958891 is a deficient number, since it is larger than the sum of its proper divisors (1).

315958891 is an equidigital number, since it uses as much as digits as its factorization.

315958891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 49.

The square root of 315958891 is about 17775.2325160601. The cubic root of 315958891 is about 681.0989230852.

The spelling of 315958891 in words is "three hundred fifteen million, nine hundred fifty-eight thousand, eight hundred ninety-one".