198473189 has 2 divisors, whose sum is σ = 198473190. Its totient is φ = 198473188.

The previous prime is 198473179. The next prime is 198473239. The reversal of 198473189 is 981374891.

It is an a-pointer prime, because the next prime (198473239) can be obtained adding 198473189 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100661089 + 97812100 = 10033^2 + 9890^2 .

It is a cyclic number.

It is not a de Polignac number, because 198473189 - 2⁴ = 198473173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198473179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99236594 + 99236595.

It is an arithmetic number, because the mean of its divisors is an integer number (99236595).

Almost surely, 2^198473189 is an apocalyptic number.

It is an amenable number.

198473189 is a deficient number, since it is larger than the sum of its proper divisors (1).

198473189 is an equidigital number, since it uses as much as digits as its factorization.

198473189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 198473189 is about 14088.0512846880. The cubic root of 198473189 is about 583.3116038346.

The spelling of 198473189 in words is "one hundred ninety-eight million, four hundred seventy-three thousand, one hundred eighty-nine".