79121136 has 40 divisors (see below), whose sum is σ = 204805840. Its totient is φ = 26320896.

The previous prime is 79121117. The next prime is 79121137. The reversal of 79121136 is 63112197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79121137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28080 + ... + 30768.

It is an arithmetic number, because the mean of its divisors is an integer number (5120146).

Almost surely, 2^79121136 is an apocalyptic number.

It is an amenable number.

79121136 is an abundant number, since it is smaller than the sum of its proper divisors (125684704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79121136 is a wasteful number, since it uses less digits than its factorization.

79121136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313 (or 3307 counting only the distinct ones).

The product of its digits is 2268, while the sum is 30.

The square root of 79121136 is about 8895.0062394582. The cubic root of 79121136 is about 429.3032451513.

The spelling of 79121136 in words is "seventy-nine million, one hundred twenty-one thousand, one hundred thirty-six".