79818964 has 24 divisors (see below), whose sum is σ = 143942400. Its totient is φ = 38704320.

The previous prime is 79818941. The next prime is 79818967. The reversal of 79818964 is 46981897.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79818967) 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, 27997 + ... + 30715.

It is an arithmetic number, because the mean of its divisors is an integer number (5997600).

Almost surely, 2^79818964 is an apocalyptic number.

It is an amenable number.

79818964 is a deficient number, since it is larger than the sum of its proper divisors (64123436).

79818964 is a wasteful number, since it uses less digits than its factorization.

79818964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943 (or 2941 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 79818964 is about 8934.1459580645. The cubic root of 79818964 is about 430.5616673270.

The spelling of 79818964 in words is "seventy-nine million, eight hundred eighteen thousand, nine hundred sixty-four".