99638275 has 24 divisors (see below), whose sum is σ = 142718544. Its totient is φ = 68198400.

The previous prime is 99638269. The next prime is 99638281. The reversal of 99638275 is 57283699.

It is an interprime number because it is at equal distance from previous prime (99638269) and next prime (99638281).

It is not a de Polignac number, because 99638275 - 2⁵ = 99638243 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5982 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (5946606).

Almost surely, 2^99638275 is an apocalyptic number.

99638275 is a deficient number, since it is larger than the sum of its proper divisors (43080269).

99638275 is a wasteful number, since it uses less digits than its factorization.

99638275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21351 (or 21346 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 99638275 is about 9981.8973647298. The cubic root of 99638275 is about 463.5985476188.

The spelling of 99638275 in words is "ninety-nine million, six hundred thirty-eight thousand, two hundred seventy-five".