79777972 has 24 divisors (see below), whose sum is σ = 143047520. Its totient is φ = 38918880.

The previous prime is 79777969. The next prime is 79777987. The reversal of 79777972 is 27977797.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27847 + ... + 30577.

Almost surely, 2^79777972 is an apocalyptic number.

It is an amenable number.

79777972 is a deficient number, since it is larger than the sum of its proper divisors (63269548).

79777972 is a wasteful number, since it uses less digits than its factorization.

79777972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911 (or 2909 counting only the distinct ones).

The product of its digits is 2722734, while the sum is 55.

The square root of 79777972 is about 8931.8515437730. The cubic root of 79777972 is about 430.4879479783.

The spelling of 79777972 in words is "seventy-nine million, seven hundred seventy-seven thousand, nine hundred seventy-two".