99000900 has 144 divisors (see below), whose sum is σ = 327201280. Its totient is φ = 25660800.

The previous prime is 99000893. The next prime is 99000917. The reversal of 99000900 is 900099.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99405 + ... + 100395.

Almost surely, 2^99000900 is an apocalyptic number.

99000900 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99000900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163600640).

99000900 is an abundant number, since it is smaller than the sum of its proper divisors (228200380).

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

99000900 is a wasteful number, since it uses less digits than its factorization.

99000900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 99000900 is about 9949.9195976651. The cubic root of 99000900 is about 462.6079027519.

Adding to 99000900 its reverse (900099), we get a palindrome (99900999).

The spelling of 99000900 in words is "ninety-nine million, nine hundred", and thus it is an aban number.