79231881 has 16 divisors (see below), whose sum is σ = 111583040. Its totient is φ = 49870080.

The previous prime is 79231861. The next prime is 79231891. The reversal of 79231881 is 18813297.

It is not a de Polignac number, because 79231881 - 2²³ = 70843273 is a prime.

It is a super-2 number, since 2×79231881² = 12555381933596322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79231861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15621 + ... + 20061.

It is an arithmetic number, because the mean of its divisors is an integer number (6973940).

Almost surely, 2^79231881 is an apocalyptic number.

It is an amenable number.

79231881 is a deficient number, since it is larger than the sum of its proper divisors (32351159).

79231881 is a wasteful number, since it uses less digits than its factorization.

79231881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776.

The product of its digits is 24192, while the sum is 39.

The square root of 79231881 is about 8901.2291847812. The cubic root of 79231881 is about 429.5034488121.

The spelling of 79231881 in words is "seventy-nine million, two hundred thirty-one thousand, eight hundred eighty-one".