99918575 has 6 divisors (see below), whose sum is σ = 123899064. Its totient is φ = 79934840.

The previous prime is 99918563. The next prime is 99918589. The reversal of 99918575 is 57581999.

It is not a de Polignac number, because 99918575 - 2²² = 95724271 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1998347 + ... + 1998396.

It is an arithmetic number, because the mean of its divisors is an integer number (20649844).

Almost surely, 2^99918575 is an apocalyptic number.

99918575 is a deficient number, since it is larger than the sum of its proper divisors (23980489).

99918575 is a wasteful number, since it uses less digits than its factorization.

99918575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996753 (or 3996748 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 53.

The square root of 99918575 is about 9995.9279209086. The cubic root of 99918575 is about 464.0328686957.

The spelling of 99918575 in words is "ninety-nine million, nine hundred eighteen thousand, five hundred seventy-five".