79912491 has 16 divisors (see below), whose sum is σ = 108691200. Its totient is φ = 52210208.

The previous prime is 79912471. The next prime is 79912517. The reversal of 79912491 is 19421997.

It is a cyclic number.

It is not a de Polignac number, because 79912491 - 2¹⁰ = 79911467 is a prime.

Its product of digits (40824) is a multiple of the sum of its prime divisors (1458).

It is not an unprimeable number, because it can be changed into a prime (79912421) 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, 89650 + ... + 90536.

It is an arithmetic number, because the mean of its divisors is an integer number (6793200).

Almost surely, 2^79912491 is an apocalyptic number.

79912491 is a deficient number, since it is larger than the sum of its proper divisors (28778709).

79912491 is a wasteful number, since it uses less digits than its factorization.

79912491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458.

The product of its digits is 40824, while the sum is 42.

The square root of 79912491 is about 8939.3786696839. The cubic root of 79912491 is about 430.7297703314.

The spelling of 79912491 in words is "seventy-nine million, nine hundred twelve thousand, four hundred ninety-one".