79536639 has 48 divisors (see below), whose sum is σ = 133469952. Its totient is φ = 41243904.

The previous prime is 79536601. The next prime is 79536673. The reversal of 79536639 is 93663597.

It is a happy number.

It is not a de Polignac number, because 79536639 - 2⁸ = 79536383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79536689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 258924 + ... + 259230.

It is an arithmetic number, because the mean of its divisors is an integer number (2780624).

Almost surely, 2^79536639 is an apocalyptic number.

79536639 is a deficient number, since it is larger than the sum of its proper divisors (53933313).

79536639 is a wasteful number, since it uses less digits than its factorization.

79536639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its digits is 918540, while the sum is 48.

The square root of 79536639 is about 8918.3316264871. The cubic root of 79536639 is about 430.0534258478.

The spelling of 79536639 in words is "seventy-nine million, five hundred thirty-six thousand, six hundred thirty-nine".