99021696 has 32 divisors (see below), whose sum is σ = 263027400. Its totient is φ = 33007104.

The previous prime is 99021691. The next prime is 99021697. The reversal of 99021696 is 69612099.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021691) 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, 128551 + ... + 129318.

Almost surely, 2^99021696 is an apocalyptic number.

99021696 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

99021696 is an abundant number, since it is smaller than the sum of its proper divisors (164005704).

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

99021696 is a wasteful number, since it uses less digits than its factorization.

99021696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257886 (or 257874 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 99021696 is about 9950.9645763614. The cubic root of 99021696 is about 462.6402920885.

The spelling of 99021696 in words is "ninety-nine million, twenty-one thousand, six hundred ninety-six".