99913825 has 24 divisors (see below), whose sum is σ = 135634176. Its totient is φ = 72408000.

The previous prime is 99913789. The next prime is 99913867. The reversal of 99913825 is 52831999.

It is not a de Polignac number, because 99913825 - 2¹³ = 99905633 is a prime.

It is a super-2 number, since 2×99913825² = 19965544852261250, which contains 22 as substring.

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, 115344 + ... + 116206.

It is an arithmetic number, because the mean of its divisors is an integer number (5651424).

Almost surely, 2^99913825 is an apocalyptic number.

It is an amenable number.

99913825 is a deficient number, since it is larger than the sum of its proper divisors (35720351).

99913825 is a wasteful number, since it uses less digits than its factorization.

99913825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1300 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The square root of 99913825 is about 9995.6903213335. The cubic root of 99913825 is about 464.0255154047.

The spelling of 99913825 in words is "ninety-nine million, nine hundred thirteen thousand, eight hundred twenty-five".