198995995 has 12 divisors (see below), whose sum is σ = 262478160. Its totient is φ = 144723920.

The previous prime is 198995983. The next prime is 198996019. The reversal of 198995995 is 599599891.

It is not a de Polignac number, because 198995995 - 2⁹ = 198995483 is a prime.

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, 163855 + ... + 165064.

It is an arithmetic number, because the mean of its divisors is an integer number (21873180).

Almost surely, 2^198995995 is an apocalyptic number.

198995995 is a deficient number, since it is larger than the sum of its proper divisors (63482165).

198995995 is a wasteful number, since it uses less digits than its factorization.

198995995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328946 (or 328935 counting only the distinct ones).

The product of its digits is 11809800, while the sum is 64.

The square root of 198995995 is about 14106.5940254903. The cubic root of 198995995 is about 583.8233294251.

The spelling of 198995995 in words is "one hundred ninety-eight million, nine hundred ninety-five thousand, nine hundred ninety-five".