315109979 has 2 divisors, whose sum is σ = 315109980. Its totient is φ = 315109978.

The previous prime is 315109967. The next prime is 315110021. The reversal of 315109979 is 979901513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315109979 - 2²⁴ = 298332763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315109919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157554989 + 157554990.

It is an arithmetic number, because the mean of its divisors is an integer number (157554990).

Almost surely, 2^315109979 is an apocalyptic number.

315109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

315109979 is an equidigital number, since it uses as much as digits as its factorization.

315109979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 315109979 is about 17751.3373862366. The cubic root of 315109979 is about 680.4883883335.

The spelling of 315109979 in words is "three hundred fifteen million, one hundred nine thousand, nine hundred seventy-nine".