198344189 has 2 divisors, whose sum is σ = 198344190. Its totient is φ = 198344188.

The previous prime is 198344171. The next prime is 198344213. The reversal of 198344189 is 981443891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150872089 + 47472100 = 12283^2 + 6890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198344189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198344129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99172094 + 99172095.

It is an arithmetic number, because the mean of its divisors is an integer number (99172095).

Almost surely, 2^198344189 is an apocalyptic number.

It is an amenable number.

198344189 is a deficient number, since it is larger than the sum of its proper divisors (1).

198344189 is an equidigital number, since it uses as much as digits as its factorization.

198344189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 198344189 is about 14083.4721926093. The cubic root of 198344189 is about 583.1851996827.

The spelling of 198344189 in words is "one hundred ninety-eight million, three hundred forty-four thousand, one hundred eighty-nine".