198017925 has 96 divisors (see below), whose sum is σ = 403783680. Its totient is φ = 83793600.

The previous prime is 198017917. The next prime is 198017933. The reversal of 198017925 is 529710891.

198017925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198017917) and next prime (198017933).

It is not a de Polignac number, because 198017925 - 2³ = 198017917 is a prime.

It is a super-2 number, since 2×198017925² = 78422197242611250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6387660 + ... + 6387690.

It is an arithmetic number, because the mean of its divisors is an integer number (4206080).

Almost surely, 2^198017925 is an apocalyptic number.

198017925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198017925 is an abundant number, since it is smaller than the sum of its proper divisors (205765755).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198017925 is an equidigital number, since it uses as much as digits as its factorization.

198017925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 198017925 is about 14071.8842021955. The cubic root of 198017925 is about 582.8652562531.

The spelling of 198017925 in words is "one hundred ninety-eight million, seventeen thousand, nine hundred twenty-five".