198446189 has 4 divisors (see below), whose sum is σ = 200492124. Its totient is φ = 196400256.

The previous prime is 198446141. The next prime is 198446197. The reversal of 198446189 is 981644891.

198446189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106956964 + 91489225 = 10342^2 + 9565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198446189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198446119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022822 + ... + 1023015.

It is an arithmetic number, because the mean of its divisors is an integer number (50123031).

Almost surely, 2^198446189 is an apocalyptic number.

It is an amenable number.

198446189 is a deficient number, since it is larger than the sum of its proper divisors (2045935).

198446189 is an equidigital number, since it uses as much as digits as its factorization.

198446189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045934.

The product of its digits is 497664, while the sum is 50.

The square root of 198446189 is about 14087.0929932332. The cubic root of 198446189 is about 583.2851516848.

The spelling of 198446189 in words is "one hundred ninety-eight million, four hundred forty-six thousand, one hundred eighty-nine".