99921884 has 12 divisors (see below), whose sum is σ = 174985608. Its totient is φ = 49926000.

The previous prime is 99921883. The next prime is 99921911. The reversal of 99921884 is 48812999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99921881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667 + ... + 14234.

It is an arithmetic number, because the mean of its divisors is an integer number (14582134).

Almost surely, 2^99921884 is an apocalyptic number.

It is an amenable number.

99921884 is a deficient number, since it is larger than the sum of its proper divisors (75063724).

99921884 is a wasteful number, since it uses less digits than its factorization.

99921884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17476 (or 17474 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 99921884 is about 9996.0934369383. The cubic root of 99921884 is about 464.0379910926.

The spelling of 99921884 in words is "ninety-nine million, nine hundred twenty-one thousand, eight hundred eighty-four".