99636999 has 16 divisors (see below), whose sum is σ = 165630720. Its totient is φ = 51759360.

The previous prime is 99636997. The next prime is 99637003. The reversal of 99636999 is 99963699.

It is not a de Polignac number, because 99636999 - 2¹ = 99636997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99636991) 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, 215434 + ... + 215895.

It is an arithmetic number, because the mean of its divisors is an integer number (10351920).

Almost surely, 2^99636999 is an apocalyptic number.

99636999 is a deficient number, since it is larger than the sum of its proper divisors (65993721).

99636999 is a wasteful number, since it uses less digits than its factorization.

99636999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431350.

The product of its digits is 6377292, while the sum is 60.

The square root of 99636999 is about 9981.8334488209. The cubic root of 99636999 is about 463.5965686126.

The spelling of 99636999 in words is "ninety-nine million, six hundred thirty-six thousand, nine hundred ninety-nine".