79549864 has 8 divisors (see below), whose sum is σ = 149156010. Its totient is φ = 39774928.

The previous prime is 79549843. The next prime is 79549901. The reversal of 79549864 is 46894597.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 78180964 + 1368900 = 8842^2 + 1170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971859 + ... + 4971874.

Almost surely, 2^79549864 is an apocalyptic number.

It is an amenable number.

79549864 is a deficient number, since it is larger than the sum of its proper divisors (69606146).

79549864 is a wasteful number, since it uses less digits than its factorization.

79549864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9943739 (or 9943735 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 79549864 is about 8919.0730460065. The cubic root of 79549864 is about 430.0772603197.

The spelling of 79549864 in words is "seventy-nine million, five hundred forty-nine thousand, eight hundred sixty-four".