99921635 has 32 divisors (see below), whose sum is σ = 134136000. Its totient is φ = 70850560.

The previous prime is 99921607. The next prime is 99921641. The reversal of 99921635 is 53612999.

It is not a de Polignac number, because 99921635 - 2¹² = 99917539 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670541 + ... + 670689.

It is an arithmetic number, because the mean of its divisors is an integer number (4191750).

Almost surely, 2^99921635 is an apocalyptic number.

99921635 is a deficient number, since it is larger than the sum of its proper divisors (34214365).

99921635 is a wasteful number, since it uses less digits than its factorization.

99921635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 131220, while the sum is 44.

The square root of 99921635 is about 9996.0809820649. The cubic root of 99921635 is about 464.0376056397.

The spelling of 99921635 in words is "ninety-nine million, nine hundred twenty-one thousand, six hundred thirty-five".