79887899 has 16 divisors (see below), whose sum is σ = 101498880. Its totient is φ = 61166880.

The previous prime is 79887893. The next prime is 79887917. The reversal of 79887899 is 99878897.

It is a cyclic number.

It is not a de Polignac number, because 79887899 - 2²⁴ = 63110683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79887893) 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, 11339 + ... + 16980.

It is an arithmetic number, because the mean of its divisors is an integer number (6343680).

Almost surely, 2^79887899 is an apocalyptic number.

79887899 is a deficient number, since it is larger than the sum of its proper divisors (21610981).

79887899 is a wasteful number, since it uses less digits than its factorization.

79887899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28370.

The product of its digits is 18289152, while the sum is 65.

The square root of 79887899 is about 8938.0030767504. The cubic root of 79887899 is about 430.6855820236.

The spelling of 79887899 in words is "seventy-nine million, eight hundred eighty-seven thousand, eight hundred ninety-nine".