791923091839 has 4 divisors (see below), whose sum is σ = 863916100200. Its totient is φ = 719930083480.

The previous prime is 791923091833. The next prime is 791923091857. The reversal of 791923091839 is 938190329197.

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 791923091839 - 2⁵ = 791923091807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791923091833) 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, 35996504164 + ... + 35996504185.

It is an arithmetic number, because the mean of its divisors is an integer number (215979025050).

Almost surely, 2^791923091839 is an apocalyptic number.

791923091839 is a deficient number, since it is larger than the sum of its proper divisors (71993008361).

791923091839 is a wasteful number, since it uses less digits than its factorization.

791923091839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71993008360.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The spelling of 791923091839 in words is "seven hundred ninety-one billion, nine hundred twenty-three million, ninety-one thousand, eight hundred thirty-nine".