899799789 has 32 divisors (see below), whose sum is σ = 1408614400. Its totient is φ = 510678000.

The previous prime is 899799787. The next prime is 899799799. The reversal of 899799789 is 987997998.

It is not a de Polignac number, because 899799789 - 2¹ = 899799787 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 899799789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899799787) 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, 152484 + ... + 158274.

It is an arithmetic number, because the mean of its divisors is an integer number (44019200).

Almost surely, 2^899799789 is an apocalyptic number.

It is an amenable number.

899799789 is a deficient number, since it is larger than the sum of its proper divisors (508814611).

899799789 is a wasteful number, since it uses less digits than its factorization.

899799789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966 (or 5952 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 75.

The square root of 899799789 is about 29996.6629644032. The cubic root of 899799789 is about 965.4177861128.

The spelling of 899799789 in words is "eight hundred ninety-nine million, seven hundred ninety-nine thousand, seven hundred eighty-nine".