99998125 has 20 divisors (see below), whose sum is σ = 125756620. Its totient is φ = 79488000.

The previous prime is 99998111. The next prime is 99998147. The reversal of 99998125 is 52189999.

It can be written as a sum of positive squares in 10 ways, for example, as 84529636 + 15468489 = 9194^2 + 3933^2 .

It is not a de Polignac number, because 99998125 - 2¹¹ = 99996077 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 120211 + ... + 121039.

It is an arithmetic number, because the mean of its divisors is an integer number (6287831).

Almost surely, 2^99998125 is an apocalyptic number.

It is an amenable number.

99998125 is a deficient number, since it is larger than the sum of its proper divisors (25758495).

99998125 is an equidigital number, since it uses as much as digits as its factorization.

99998125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1027 counting only the distinct ones).

The product of its digits is 524880, while the sum is 52.

The square root of 99998125 is about 9999.9062495605. The cubic root of 99998125 is about 464.1559823501.

The spelling of 99998125 in words is "ninety-nine million, nine hundred ninety-eight thousand, one hundred twenty-five".