198000889 has 2 divisors, whose sum is σ = 198000890. Its totient is φ = 198000888.

The previous prime is 198000863. The next prime is 198000911. The reversal of 198000889 is 988000891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187470864 + 10530025 = 13692^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 198000889 - 2⁵ = 198000857 is a prime.

It is not a weakly prime, because it can be changed into another prime (198003889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99000444 + 99000445.

It is an arithmetic number, because the mean of its divisors is an integer number (99000445).

Almost surely, 2^198000889 is an apocalyptic number.

It is an amenable number.

198000889 is a deficient number, since it is larger than the sum of its proper divisors (1).

198000889 is an equidigital number, since it uses as much as digits as its factorization.

198000889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 198000889 is about 14071.2788686743. The cubic root of 198000889 is about 582.8485406329.

The spelling of 198000889 in words is "one hundred ninety-eight million, eight hundred eighty-nine", and thus it is an aban number.