315620779 has 2 divisors, whose sum is σ = 315620780. Its totient is φ = 315620778.

The previous prime is 315620729. The next prime is 315620807. The reversal of 315620779 is 977026513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315620779 - 2¹¹ = 315618731 is a prime.

It is a super-2 number, since 2×315620779² = 199232952273133682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315620729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157810389 + 157810390.

It is an arithmetic number, because the mean of its divisors is an integer number (157810390).

Almost surely, 2^315620779 is an apocalyptic number.

315620779 is a deficient number, since it is larger than the sum of its proper divisors (1).

315620779 is an equidigital number, since it uses as much as digits as its factorization.

315620779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 315620779 is about 17765.7192086332. The cubic root of 315620779 is about 680.8558852310.

The spelling of 315620779 in words is "three hundred fifteen million, six hundred twenty thousand, seven hundred seventy-nine".