79977654 has 12 divisors (see below), whose sum is σ = 173284956. Its totient is φ = 26659212.

The previous prime is 79977641. The next prime is 79977697. The reversal of 79977654 is 45677997.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 79977654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2221584 + ... + 2221619.

It is an arithmetic number, because the mean of its divisors is an integer number (14440413).

Almost surely, 2^79977654 is an apocalyptic number.

79977654 is an abundant number, since it is smaller than the sum of its proper divisors (93307302).

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

79977654 is a wasteful number, since it uses less digits than its factorization.

79977654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443211 (or 4443208 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The square root of 79977654 is about 8943.0226433796. The cubic root of 79977654 is about 430.8468151057.

It can be divided in two parts, 7997 and 7654, that added together give a palindrome (15651).

The spelling of 79977654 in words is "seventy-nine million, nine hundred seventy-seven thousand, six hundred fifty-four".