79871992 has 8 divisors (see below), whose sum is σ = 149760000. Its totient is φ = 39935992.

The previous prime is 79871929. The next prime is 79872019. The reversal of 79871992 is 29917897.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4991992 + ... + 4992007.

It is an arithmetic number, because the mean of its divisors is an integer number (18720000).

Almost surely, 2^79871992 is an apocalyptic number.

It is an amenable number.

79871992 is a deficient number, since it is larger than the sum of its proper divisors (69888008).

79871992 is a wasteful number, since it uses less digits than its factorization.

79871992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9984005 (or 9984001 counting only the distinct ones).

The product of its digits is 571536, while the sum is 52.

The square root of 79871992 is about 8937.1131804403. The cubic root of 79871992 is about 430.6569945887.

The spelling of 79871992 in words is "seventy-nine million, eight hundred seventy-one thousand, nine hundred ninety-two".