77972696 has 8 divisors (see below), whose sum is σ = 146198820. Its totient is φ = 38986344.

The previous prime is 77972683. The next prime is 77972747. The reversal of 77972696 is 69627977.

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, 4873286 + ... + 4873301.

Almost surely, 2^77972696 is an apocalyptic number.

It is an amenable number.

77972696 is a deficient number, since it is larger than the sum of its proper divisors (68226124).

77972696 is a wasteful number, since it uses less digits than its factorization.

77972696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9746593 (or 9746589 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 53.

The square root of 77972696 is about 8830.2149464212. The cubic root of 77972696 is about 427.2160073631.

The spelling of 77972696 in words is "seventy-seven million, nine hundred seventy-two thousand, six hundred ninety-six".