791731 has 4 divisors (see below), whose sum is σ = 794200. Its totient is φ = 789264.

The previous prime is 791699. The next prime is 791773. The reversal of 791731 is 137197.

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 791731 - 2⁵ = 791699 is a prime.

It is a super-2 number, since 2×791731² = 1253675952722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 791731.

It is not an unprimeable number, because it can be changed into a prime (791431) 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, 666 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (198550).

2⁷⁹¹⁷³¹ is an apocalyptic number.

791731 is a deficient number, since it is larger than the sum of its proper divisors (2469).

791731 is a wasteful number, since it uses less digits than its factorization.

791731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its digits is 1323, while the sum is 28.

The square root of 791731 is about 889.7926724805. The cubic root of 791731 is about 92.5108241533.

The spelling of 791731 in words is "seven hundred ninety-one thousand, seven hundred thirty-one".