79870881 has 16 divisors (see below), whose sum is σ = 111366144. Its totient is φ = 50821584.

The previous prime is 79870877. The next prime is 79870883. The reversal of 79870881 is 18807897.

It is not a de Polignac number, because 79870881 - 2² = 79870877 is a prime.

It is a super-2 number, since 2×79870881² = 12758715263432322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79870881.

It is not an unprimeable number, because it can be changed into a prime (79870883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40930 + ... + 42836.

It is an arithmetic number, because the mean of its divisors is an integer number (6960384).

Almost surely, 2^79870881 is an apocalyptic number.

It is an amenable number.

79870881 is a deficient number, since it is larger than the sum of its proper divisors (31495263).

79870881 is a wasteful number, since it uses less digits than its factorization.

79870881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 79870881 is about 8937.0510236878. The cubic root of 79870881 is about 430.6549978014.

The spelling of 79870881 in words is "seventy-nine million, eight hundred seventy thousand, eight hundred eighty-one".