79090731 has 6 divisors (see below), whose sum is σ = 114242180. Its totient is φ = 52727148.

The previous prime is 79090643. The next prime is 79090733. The reversal of 79090731 is 13709097.

It is not a de Polignac number, because 79090731 - 2¹⁰ = 79089707 is a prime.

It is a super-2 number, since 2×79090731² = 12510687460228722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79090733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4393921 + ... + 4393938.

Almost surely, 2^79090731 is an apocalyptic number.

79090731 is a deficient number, since it is larger than the sum of its proper divisors (35151449).

79090731 is a wasteful number, since it uses less digits than its factorization.

79090731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8787865 (or 8787862 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 79090731 is about 8893.2969701905. The cubic root of 79090731 is about 429.2482466254.

The spelling of 79090731 in words is "seventy-nine million, ninety thousand, seven hundred thirty-one".