899121998 has 16 divisors (see below), whose sum is σ = 1387751616. Its totient is φ = 436706400.

The previous prime is 899121961. The next prime is 899122019.

899121998 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31286 + ... + 52697.

It is an arithmetic number, because the mean of its divisors is an integer number (86734476).

Almost surely, 2^899121998 is an apocalyptic number.

899121998 is a deficient number, since it is larger than the sum of its proper divisors (488629618).

899121998 is a wasteful number, since it uses less digits than its factorization.

899121998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84139.

The product of its digits is 839808, while the sum is 56.

The square root of 899121998 is about 29985.3630626678. The cubic root of 899121998 is about 965.1753188942.

The spelling of 899121998 in words is "eight hundred ninety-nine million, one hundred twenty-one thousand, nine hundred ninety-eight".