899101998 has 32 divisors (see below), whose sum is σ = 2052009120. Its totient is φ = 291600000.

The previous prime is 899101981. The next prime is 899101999.

899101998 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899101999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223003 + ... + 226998.

It is an arithmetic number, because the mean of its divisors is an integer number (64125285).

Almost surely, 2^899101998 is an apocalyptic number.

899101998 is an abundant number, since it is smaller than the sum of its proper divisors (1152907122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

899101998 is a wasteful number, since it uses less digits than its factorization.

899101998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450049 (or 450043 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 899101998 is about 29985.0295647678. The cubic root of 899101998 is about 965.1681624128.

The spelling of 899101998 in words is "eight hundred ninety-nine million, one hundred one thousand, nine hundred ninety-eight".