899806879 has 4 divisors (see below), whose sum is σ = 908715960. Its totient is φ = 890897800.

The previous prime is 899806877. The next prime is 899806891. The reversal of 899806879 is 978608998.

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

It is a cyclic number.

It is not a de Polignac number, because 899806879 - 2¹ = 899806877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 899806879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899806877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4454389 + ... + 4454590.

It is an arithmetic number, because the mean of its divisors is an integer number (227178990).

Almost surely, 2^899806879 is an apocalyptic number.

899806879 is a deficient number, since it is larger than the sum of its proper divisors (8909081).

899806879 is a wasteful number, since it uses less digits than its factorization.

899806879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8909080.

The product of its (nonzero) digits is 15676416, while the sum is 64.

The square root of 899806879 is about 29996.7811439828. The cubic root of 899806879 is about 965.4203217858.

The spelling of 899806879 in words is "eight hundred ninety-nine million, eight hundred six thousand, eight hundred seventy-nine".