79108509 has 4 divisors (see below), whose sum is σ = 105478016. Its totient is φ = 52739004.

The previous prime is 79108501. The next prime is 79108517. The reversal of 79108509 is 90580197.

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 an interprime number because it is at equal distance from previous prime (79108501) and next prime (79108517).

It is not a de Polignac number, because 79108509 - 2³ = 79108501 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 (79108501) 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, 13184749 + ... + 13184754.

It is an arithmetic number, because the mean of its divisors is an integer number (26369504).

Almost surely, 2^79108509 is an apocalyptic number.

It is an amenable number.

79108509 is a deficient number, since it is larger than the sum of its proper divisors (26369507).

79108509 is a wasteful number, since it uses less digits than its factorization.

79108509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26369506.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 79108509 is about 8894.2964308595. The cubic root of 79108509 is about 429.2804063299.

The spelling of 79108509 in words is "seventy-nine million, one hundred eight thousand, five hundred nine".