79539609 has 4 divisors (see below), whose sum is σ = 106052816. Its totient is φ = 53026404.

The previous prime is 79539571. The next prime is 79539613. The reversal of 79539609 is 90693597.

It is a happy number.

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 not a de Polignac number, because 79539609 - 2²⁴ = 62762393 is a prime.

It is a super-3 number, since 3×79539609³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79539619) 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, 13256599 + ... + 13256604.

It is an arithmetic number, because the mean of its divisors is an integer number (26513204).

Almost surely, 2^79539609 is an apocalyptic number.

It is an amenable number.

79539609 is a deficient number, since it is larger than the sum of its proper divisors (26513207).

79539609 is a wasteful number, since it uses less digits than its factorization.

79539609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26513206.

The product of its (nonzero) digits is 459270, while the sum is 48.

The square root of 79539609 is about 8918.4981358971. The cubic root of 79539609 is about 430.0587786965.

It can be divided in two parts, 795 and 39609, that added together give a palindrome (40404).

The spelling of 79539609 in words is "seventy-nine million, five hundred thirty-nine thousand, six hundred nine".