79542931 has 12 divisors (see below), whose sum is σ = 88527936. Its totient is φ = 71044560.

The previous prime is 79542923. The next prime is 79542971. The reversal of 79542931 is 13924597.

It is not a de Polignac number, because 79542931 - 2³ = 79542923 is a prime.

It is a super-2 number, since 2×79542931² = 12654155744141522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79542971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9310 + ... + 15676.

It is an arithmetic number, because the mean of its divisors is an integer number (7377328).

Almost surely, 2^79542931 is an apocalyptic number.

79542931 is a deficient number, since it is larger than the sum of its proper divisors (8985005).

79542931 is a wasteful number, since it uses less digits than its factorization.

79542931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442 (or 6411 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 79542931 is about 8918.6843760725. The cubic root of 79542931 is about 430.0647657990.

The spelling of 79542931 in words is "seventy-nine million, five hundred forty-two thousand, nine hundred thirty-one".