791881 has 4 divisors (see below), whose sum is σ = 794500. Its totient is φ = 789264.

The previous prime is 791851. The next prime is 791887. The reversal of 791881 is 188197.

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

It can be written as a sum of positive squares in 2 ways, for example, as 266256 + 525625 = 516^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 791881 - 2⁵ = 791849 is a prime.

It is a super-2 number, since 2×791881² = 1254151036322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791887) 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, 786 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (198625).

2⁷⁹¹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

791881 is a deficient number, since it is larger than the sum of its proper divisors (2619).

791881 is a wasteful number, since it uses less digits than its factorization.

791881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its digits is 4032, while the sum is 34.

The square root of 791881 is about 889.8769577869. The cubic root of 791881 is about 92.5166660986.

The spelling of 791881 in words is "seven hundred ninety-one thousand, eight hundred eighty-one".