79057931 has 2 divisors, whose sum is σ = 79057932. Its totient is φ = 79057930.

The previous prime is 79057921. The next prime is 79057943. The reversal of 79057931 is 13975097.

It is a weak prime.

It is an emirp because it is prime and its reverse (13975097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79057931 - 2¹⁰ = 79056907 is a prime.

It is a super-2 number, since 2×79057931² = 12500312908001522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79057921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39528965 + 39528966.

It is an arithmetic number, because the mean of its divisors is an integer number (39528966).

Almost surely, 2^79057931 is an apocalyptic number.

79057931 is a deficient number, since it is larger than the sum of its proper divisors (1).

79057931 is an equidigital number, since it uses as much as digits as its factorization.

79057931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 79057931 is about 8891.4526934579. The cubic root of 79057931 is about 429.1889000620.

The spelling of 79057931 in words is "seventy-nine million, fifty-seven thousand, nine hundred thirty-one".