79391751 has 16 divisors (see below), whose sum is σ = 115114464. Its totient is φ = 48466944.

The previous prime is 79391743. The next prime is 79391771. The reversal of 79391751 is 15719397.

It is not a de Polignac number, because 79391751 - 2³ = 79391743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79391771) 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, 19150 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (7194654).

Almost surely, 2^79391751 is an apocalyptic number.

79391751 is a deficient number, since it is larger than the sum of its proper divisors (35722713).

79391751 is a wasteful number, since it uses less digits than its factorization.

79391751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42130.

The product of its digits is 59535, while the sum is 42.

The square root of 79391751 is about 8910.2048797993. The cubic root of 79391751 is about 429.7921313663.

The spelling of 79391751 in words is "seventy-nine million, three hundred ninety-one thousand, seven hundred fifty-one".