77697992 has 16 divisors (see below), whose sum is σ = 153351600. Its totient is φ = 36804240.

The previous prime is 77697967. The next prime is 77698013. The reversal of 77697992 is 29979677.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255434 + ... + 255737.

It is an arithmetic number, because the mean of its divisors is an integer number (9584475).

Almost surely, 2^77697992 is an apocalyptic number.

It is an amenable number.

77697992 is a deficient number, since it is larger than the sum of its proper divisors (75653608).

77697992 is a wasteful number, since it uses less digits than its factorization.

77697992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511196 (or 511192 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 56.

The square root of 77697992 is about 8814.6464478163. The cubic root of 77697992 is about 426.7137117179.

The spelling of 77697992 in words is "seventy-seven million, six hundred ninety-seven thousand, nine hundred ninety-two".