79528013 has 4 divisors (see below), whose sum is σ = 79561020. Its totient is φ = 79495008.

The previous prime is 79527991. The next prime is 79528019. The reversal of 79528013 is 31082597.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69172489 + 10355524 = 8317^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 79528013 - 2⁶ = 79527949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79528019) 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, 12578 + ... + 17811.

It is an arithmetic number, because the mean of its divisors is an integer number (19890255).

Almost surely, 2^79528013 is an apocalyptic number.

It is an amenable number.

79528013 is a deficient number, since it is larger than the sum of its proper divisors (33007).

79528013 is a wasteful number, since it uses less digits than its factorization.

79528013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33006.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 79528013 is about 8917.8480027415. The cubic root of 79528013 is about 430.0378784011.

The spelling of 79528013 in words is "seventy-nine million, five hundred twenty-eight thousand, thirteen".