79697872 has 20 divisors (see below), whose sum is σ = 155367040. Its totient is φ = 39603168.

The previous prime is 79697861. The next prime is 79697879. The reversal of 79697872 is 27879697.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79697879) 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, 12672 + ... + 17887.

It is an arithmetic number, because the mean of its divisors is an integer number (7768352).

Almost surely, 2^79697872 is an apocalyptic number.

It is an amenable number.

79697872 is a deficient number, since it is larger than the sum of its proper divisors (75669168).

79697872 is a wasteful number, since it uses less digits than its factorization.

79697872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30730 (or 30724 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 55.

The square root of 79697872 is about 8927.3664649772. The cubic root of 79697872 is about 430.3438245207.

The spelling of 79697872 in words is "seventy-nine million, six hundred ninety-seven thousand, eight hundred seventy-two".