99687575 has 24 divisors (see below), whose sum is σ = 140959728. Its totient is φ = 69281280.

The previous prime is 99687571. The next prime is 99687613. The reversal of 99687575 is 57578699.

It is not a de Polignac number, because 99687575 - 2² = 99687571 is a prime.

It is a super-2 number, since 2×99687575² = 19875225218761250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99687575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99687571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3497 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (5873322).

Almost surely, 2^99687575 is an apocalyptic number.

99687575 is a deficient number, since it is larger than the sum of its proper divisors (41272153).

99687575 is a wasteful number, since it uses less digits than its factorization.

99687575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18083 (or 18078 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 56.

The square root of 99687575 is about 9984.3665297304. The cubic root of 99687575 is about 463.6749962857.

The spelling of 99687575 in words is "ninety-nine million, six hundred eighty-seven thousand, five hundred seventy-five".