79604009 has 4 divisors (see below), whose sum is σ = 79622340. Its totient is φ = 79585680.

The previous prime is 79603991. The next prime is 79604011. The reversal of 79604009 is 90040697.

It is a happy number.

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 60217600 + 19386409 = 7760^2 + 4403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79604009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79604009.

It is not an unprimeable number, because it can be changed into a prime (79604069) 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, 1439 + ... + 12699.

It is an arithmetic number, because the mean of its divisors is an integer number (19905585).

Almost surely, 2^79604009 is an apocalyptic number.

It is an amenable number.

79604009 is a deficient number, since it is larger than the sum of its proper divisors (18331).

79604009 is a wasteful number, since it uses less digits than its factorization.

79604009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18330.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 79604009 is about 8922.1078787470. The cubic root of 79604009 is about 430.1748144441.

The spelling of 79604009 in words is "seventy-nine million, six hundred four thousand, nine".