99651900 has 72 divisors (see below), whose sum is σ = 289450224. Its totient is φ = 26470400.

The previous prime is 99651899. The next prime is 99651901. The reversal of 99651900 is 915699.

It is an interprime number because it is at equal distance from previous prime (99651899) and next prime (99651901).

It is a super-2 number, since 2×99651900² = 19861002347220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99651901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105430 + ... + 106370.

It is an arithmetic number, because the mean of its divisors is an integer number (4020142).

Almost surely, 2^99651900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99651900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144725112).

99651900 is an abundant number, since it is smaller than the sum of its proper divisors (189798324).

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

99651900 is a wasteful number, since it uses less digits than its factorization.

99651900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 99651900 is about 9982.5798268784. The cubic root of 99651900 is about 463.6196781944.

The spelling of 99651900 in words is "ninety-nine million, six hundred fifty-one thousand, nine hundred".