99897989100 has 576 divisors, whose sum is σ = 396524620800. Its totient is φ = 18791792640.

The previous prime is 99897989057. The next prime is 99897989123. The reversal of 99897989100 is 198979899.

99897989100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8812236 + ... + 8823564.

It is an arithmetic number, because the mean of its divisors is an integer number (688410800).

Almost surely, 2^99897989100 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 99897989100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198262310400).

99897989100 is an abundant number, since it is smaller than the sum of its proper divisors (296626631700).

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

99897989100 is a wasteful number, since it uses less digits than its factorization.

99897989100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11402 (or 11395 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 69.

The spelling of 99897989100 in words is "ninety-nine billion, eight hundred ninety-seven million, nine hundred eighty-nine thousand, one hundred".