99921608 has 64 divisors (see below), whose sum is σ = 205656000. Its totient is φ = 45349632.

The previous prime is 99921607. The next prime is 99921641. The reversal of 99921608 is 80612999.

It is not an unprimeable number, because it can be changed into a prime (99921607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612935 + ... + 613097.

It is an arithmetic number, because the mean of its divisors is an integer number (3213375).

Almost surely, 2^99921608 is an apocalyptic number.

It is an amenable number.

99921608 is an abundant number, since it is smaller than the sum of its proper divisors (105734392).

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

99921608 is a wasteful number, since it uses less digits than its factorization.

99921608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 99921608 is about 9996.0796315356. The cubic root of 99921608 is about 464.0375638435.

The spelling of 99921608 in words is "ninety-nine million, nine hundred twenty-one thousand, six hundred eight".