79491331 has 4 divisors (see below), whose sum is σ = 79557552. Its totient is φ = 79425112.

The previous prime is 79491323. The next prime is 79491353. The reversal of 79491331 is 13319497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13319497 = 29 ⋅459293.

It is a cyclic number.

It is not a de Polignac number, because 79491331 - 2³ = 79491323 is a prime.

It is a super-2 number, since 2×79491331² = 12637743408303122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79492331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31276 + ... + 33721.

It is an arithmetic number, because the mean of its divisors is an integer number (19889388).

Almost surely, 2^79491331 is an apocalyptic number.

79491331 is a deficient number, since it is larger than the sum of its proper divisors (66221).

79491331 is a wasteful number, since it uses less digits than its factorization.

79491331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66220.

The product of its digits is 20412, while the sum is 37.

The square root of 79491331 is about 8915.7911034299. The cubic root of 79491331 is about 429.9717504427.

The spelling of 79491331 in words is "seventy-nine million, four hundred ninety-one thousand, three hundred thirty-one".