315612691 has 2 divisors, whose sum is σ = 315612692. Its totient is φ = 315612690.

The previous prime is 315612677. The next prime is 315612709. The reversal of 315612691 is 196216513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315612691 - 2⁵ = 315612659 is a prime.

It is a super-2 number, since 2×315612691² = 199222741440522962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315612631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157806345 + 157806346.

It is an arithmetic number, because the mean of its divisors is an integer number (157806346).

Almost surely, 2^315612691 is an apocalyptic number.

315612691 is a deficient number, since it is larger than the sum of its proper divisors (1).

315612691 is an equidigital number, since it uses as much as digits as its factorization.

315612691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 315612691 is about 17765.4915777752. The cubic root of 315612691 is about 680.8500693808.

The spelling of 315612691 in words is "three hundred fifteen million, six hundred twelve thousand, six hundred ninety-one".