99640835 has 16 divisors (see below), whose sum is σ = 137528256. Its totient is φ = 67886208.

The previous prime is 99640831. The next prime is 99640873. The reversal of 99640835 is 53804699.

It is a cyclic number.

It is not a de Polignac number, because 99640835 - 2² = 99640831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99640831) 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, 3572 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (8595516).

Almost surely, 2^99640835 is an apocalyptic number.

99640835 is a deficient number, since it is larger than the sum of its proper divisors (37887421).

99640835 is a wasteful number, since it uses less digits than its factorization.

99640835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18302.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 99640835 is about 9982.0255960401. The cubic root of 99640835 is about 463.6025179876.

The spelling of 99640835 in words is "ninety-nine million, six hundred forty thousand, eight hundred thirty-five".