79386905 has 12 divisors (see below), whose sum is σ = 103157100. Its totient is φ = 58623552.

The previous prime is 79386887. The next prime is 79386911. The reversal of 79386905 is 50968397.

It can be written as a sum of positive squares in 6 ways, for example, as 10214416 + 69172489 = 3196^2 + 8317^2 .

It is not a de Polignac number, because 79386905 - 2⁸ = 79386649 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.

It is a self number, because there is not a number n which added to its sum of digits gives 79386905.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46130 + ... + 47819.

It is an arithmetic number, because the mean of its divisors is an integer number (8596425).

Almost surely, 2^79386905 is an apocalyptic number.

It is an amenable number.

79386905 is a deficient number, since it is larger than the sum of its proper divisors (23770195).

79386905 is a wasteful number, since it uses less digits than its factorization.

79386905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93980 (or 93967 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 79386905 is about 8909.9329402639. The cubic root of 79386905 is about 429.7833864819.

The spelling of 79386905 in words is "seventy-nine million, three hundred eighty-six thousand, nine hundred five".