198699025 has 24 divisors (see below), whose sum is σ = 282670400. Its totient is φ = 135725760.

The previous prime is 198699023. The next prime is 198699031. The reversal of 198699025 is 520996891.

It is not a de Polignac number, because 198699025 - 2¹ = 198699023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198699025.

It is not an unprimeable number, because it can be changed into a prime (198699023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46426 + ... + 50524.

Almost surely, 2^198699025 is an apocalyptic number.

It is an amenable number.

198699025 is a deficient number, since it is larger than the sum of its proper divisors (83971375).

198699025 is a wasteful number, since it uses less digits than its factorization.

198699025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 198699025 is about 14096.0641669936. The cubic root of 198699025 is about 583.5327635570.

The spelling of 198699025 in words is "one hundred ninety-eight million, six hundred ninety-nine thousand, twenty-five".