79179905 has 16 divisors (see below), whose sum is σ = 108958080. Its totient is φ = 54110592.

The previous prime is 79179871. The next prime is 79179907. The reversal of 79179905 is 50997197.

It is a happy number.

It is not a de Polignac number, because 79179905 - 2¹⁴ = 79163521 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 79179905.

It is not an unprimeable number, because it can be changed into a prime (79179907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7061 + ... + 14429.

It is an arithmetic number, because the mean of its divisors is an integer number (6809880).

Almost surely, 2^79179905 is an apocalyptic number.

It is an amenable number.

79179905 is a deficient number, since it is larger than the sum of its proper divisors (29778175).

79179905 is a wasteful number, since it uses less digits than its factorization.

79179905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 79179905 is about 8898.3091090386. The cubic root of 79179905 is about 429.4095103863.

The spelling of 79179905 in words is "seventy-nine million, one hundred seventy-nine thousand, nine hundred five".