79708909 has 8 divisors (see below), whose sum is σ = 91175168. Its totient is φ = 68262480.

The previous prime is 79708859. The next prime is 79708913. The reversal of 79708909 is 90980797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79708909 - 2¹⁵ = 79676141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79708939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4999 + ... + 13579.

It is an arithmetic number, because the mean of its divisors is an integer number (11396896).

Almost surely, 2^79708909 is an apocalyptic number.

It is an amenable number.

79708909 is a deficient number, since it is larger than the sum of its proper divisors (11466259).

79708909 is a wasteful number, since it uses less digits than its factorization.

79708909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 79708909 is about 8927.9845990011. The cubic root of 79708909 is about 430.3636890642.

The spelling of 79708909 in words is "seventy-nine million, seven hundred eight thousand, nine hundred nine".