79393881 has 32 divisors (see below), whose sum is σ = 124185600. Its totient is φ = 44182080.

The previous prime is 79393871. The next prime is 79393891. The reversal of 79393881 is 18839397.

It is an interprime number because it is at equal distance from previous prime (79393871) and next prime (79393891).

It is not a de Polignac number, because 79393881 - 2⁵ = 79393849 is a prime.

It is a super-2 number, since 2×79393881² = 12606776680484322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 79393881.

It is not an unprimeable number, because it can be changed into a prime (79393871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171991 + ... + 172451.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^79393881 is an apocalyptic number.

It is an amenable number.

79393881 is a deficient number, since it is larger than the sum of its proper divisors (44791719).

79393881 is a wasteful number, since it uses less digits than its factorization.

79393881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its digits is 326592, while the sum is 48.

The square root of 79393881 is about 8910.3244048688. The cubic root of 79393881 is about 429.7959749607.

The spelling of 79393881 in words is "seventy-nine million, three hundred ninety-three thousand, eight hundred eighty-one".