79079521 has 4 divisors (see below), whose sum is σ = 80762112. Its totient is φ = 77396932.

The previous prime is 79079477. The next prime is 79079531. The reversal of 79079521 is 12597097.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79079521 - 2¹⁹ = 78555233 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79079531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841225 + ... + 841318.

It is an arithmetic number, because the mean of its divisors is an integer number (20190528).

Almost surely, 2^79079521 is an apocalyptic number.

It is an amenable number.

79079521 is a deficient number, since it is larger than the sum of its proper divisors (1682591).

79079521 is a wasteful number, since it uses less digits than its factorization.

79079521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682590.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 79079521 is about 8892.6666979034. Note that the first 4 decimals coincide. The cubic root of 79079521 is about 429.2279656976.

The spelling of 79079521 in words is "seventy-nine million, seventy-nine thousand, five hundred twenty-one".