79604721 has 16 divisors (see below), whose sum is σ = 134780800. Its totient is φ = 45488304.

The previous prime is 79604717. The next prime is 79604729. The reversal of 79604721 is 12740697.

It is a happy number.

It is not a de Polignac number, because 79604721 - 2² = 79604717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79604729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210406 + ... + 210783.

It is an arithmetic number, because the mean of its divisors is an integer number (8423800).

Almost surely, 2^79604721 is an apocalyptic number.

It is an amenable number.

79604721 is a deficient number, since it is larger than the sum of its proper divisors (55176079).

79604721 is a wasteful number, since it uses less digits than its factorization.

79604721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421205 (or 421199 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 79604721 is about 8922.1477795428. The cubic root of 79604721 is about 430.1760969740.

The spelling of 79604721 in words is "seventy-nine million, six hundred four thousand, seven hundred twenty-one".