79972506 has 12 divisors (see below), whose sum is σ = 173273802. Its totient is φ = 26657496.

The previous prime is 79972493. The next prime is 79972513. The reversal of 79972506 is 60527997.

79972506 is a `hidden beast` number, since 79 + 9 + 72 + 506 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49070025 + 30902481 = 7005^2 + 5559^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2221441 + ... + 2221476.

Almost surely, 2^79972506 is an apocalyptic number.

79972506 is an abundant number, since it is smaller than the sum of its proper divisors (93301296).

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

79972506 is a wasteful number, since it uses less digits than its factorization.

79972506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442925 (or 4442922 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 79972506 is about 8942.7348165983. The cubic root of 79972506 is about 430.8375706610.

The spelling of 79972506 in words is "seventy-nine million, nine hundred seventy-two thousand, five hundred six".