791347231 has 4 divisors (see below), whose sum is σ = 812735032. Its totient is φ = 769959432.

The previous prime is 791347213. The next prime is 791347253. The reversal of 791347231 is 132743197.

It is a happy number.

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 791347231 - 2²³ = 782958623 is a prime.

It is a super-2 number, since 2×791347231² = 1252460880022734722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 21387763 = 791347231 / (7 + 9 + 1 + 3 + 4 + 7 + 2 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791347201) 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, 10693845 + ... + 10693918.

It is an arithmetic number, because the mean of its divisors is an integer number (203183758).

Almost surely, 2^791347231 is an apocalyptic number.

791347231 is a deficient number, since it is larger than the sum of its proper divisors (21387801).

791347231 is a wasteful number, since it uses less digits than its factorization.

791347231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21387800.

The product of its digits is 31752, while the sum is 37.

The square root of 791347231 is about 28130.8946000656. The cubic root of 791347231 is about 924.9587441059.

The spelling of 791347231 in words is "seven hundred ninety-one million, three hundred forty-seven thousand, two hundred thirty-one".