791136491 has 4 divisors (see below), whose sum is σ = 791253672. Its totient is φ = 791019312.

The previous prime is 791136481. The next prime is 791136539. The reversal of 791136491 is 194631197.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 791136491 - 2⁶ = 791136427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791136481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47801 + ... + 62186.

It is an arithmetic number, because the mean of its divisors is an integer number (197813418).

Almost surely, 2^791136491 is an apocalyptic number.

791136491 is a deficient number, since it is larger than the sum of its proper divisors (117181).

791136491 is a wasteful number, since it uses less digits than its factorization.

791136491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117180.

The product of its digits is 40824, while the sum is 41.

The square root of 791136491 is about 28127.1486468145. The cubic root of 791136491 is about 924.8766296628.

The spelling of 791136491 in words is "seven hundred ninety-one million, one hundred thirty-six thousand, four hundred ninety-one".