198203189 has 4 divisors (see below), whose sum is σ = 198533580. Its totient is φ = 197872800.

The previous prime is 198203177. The next prime is 198203207. The reversal of 198203189 is 981302891.

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 124500964 + 73702225 = 11158^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 198203189 - 2¹² = 198199093 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 (198209189) 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, 164294 + ... + 165495.

It is an arithmetic number, because the mean of its divisors is an integer number (49633395).

Almost surely, 2^198203189 is an apocalyptic number.

It is an amenable number.

198203189 is a deficient number, since it is larger than the sum of its proper divisors (330391).

198203189 is an equidigital number, since it uses as much as digits as its factorization.

198203189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330390.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 198203189 is about 14078.4654348405. The cubic root of 198203189 is about 583.0469742971.

The spelling of 198203189 in words is "one hundred ninety-eight million, two hundred three thousand, one hundred eighty-nine".