99988025 has 12 divisors (see below), whose sum is σ = 125481552. Its totient is φ = 79025040.

The previous prime is 99988019. The next prime is 99988037. The reversal of 99988025 is 52088999.

It is not a de Polignac number, because 99988025 - 2⁶ = 99987961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22019 + ... + 26168.

It is an arithmetic number, because the mean of its divisors is an integer number (10456796).

Almost surely, 2^99988025 is an apocalyptic number.

It is an amenable number.

99988025 is a deficient number, since it is larger than the sum of its proper divisors (25493527).

99988025 is a wasteful number, since it uses less digits than its factorization.

99988025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48280 (or 48275 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 99988025 is about 9999.4012320738. The cubic root of 99988025 is about 464.1403549462.

The spelling of 99988025 in words is "ninety-nine million, nine hundred eighty-eight thousand, twenty-five".