79556131 has 4 divisors (see below), whose sum is σ = 80904600. Its totient is φ = 78207664.

The previous prime is 79556129. The next prime is 79556143. The reversal of 79556131 is 13165597.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79556131 - 2¹ = 79556129 is a prime.

It is a super-2 number, since 2×79556131² = 12658355959378322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79556161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674146 + ... + 674263.

It is an arithmetic number, because the mean of its divisors is an integer number (20226150).

Almost surely, 2^79556131 is an apocalyptic number.

79556131 is a deficient number, since it is larger than the sum of its proper divisors (1348469).

79556131 is a wasteful number, since it uses less digits than its factorization.

79556131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348468.

The product of its digits is 28350, while the sum is 37.

The square root of 79556131 is about 8919.4243648343. The cubic root of 79556131 is about 430.0885539632.

The spelling of 79556131 in words is "seventy-nine million, five hundred fifty-six thousand, one hundred thirty-one".