791981831 has 8 divisors (see below), whose sum is σ = 818256384. Its totient is φ = 765752760.

The previous prime is 791981821. The next prime is 791981833. The reversal of 791981831 is 138189197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 791981831 - 2²² = 787787527 is a prime.

It is a super-2 number, since 2×791981831² = 1254470441268225122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791981833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26036 + ... + 47558.

It is an arithmetic number, because the mean of its divisors is an integer number (102282048).

Almost surely, 2^791981831 is an apocalyptic number.

791981831 is a deficient number, since it is larger than the sum of its proper divisors (26274553).

791981831 is a wasteful number, since it uses less digits than its factorization.

791981831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22741.

The product of its digits is 108864, while the sum is 47.

The square root of 791981831 is about 28142.1717534379. The cubic root of 791981831 is about 925.2059267845.

The spelling of 791981831 in words is "seven hundred ninety-one million, nine hundred eighty-one thousand, eight hundred thirty-one".