198016589 has 2 divisors, whose sum is σ = 198016590. Its totient is φ = 198016588.

The previous prime is 198016547. The next prime is 198016597. The reversal of 198016589 is 985610891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147136900 + 50879689 = 12130^2 + 7133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198016589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198016789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99008294 + 99008295.

It is an arithmetic number, because the mean of its divisors is an integer number (99008295).

Almost surely, 2^198016589 is an apocalyptic number.

It is an amenable number.

198016589 is a deficient number, since it is larger than the sum of its proper divisors (1).

198016589 is an equidigital number, since it uses as much as digits as its factorization.

198016589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 198016589 is about 14071.8367315713. The cubic root of 198016589 is about 582.8639454126.

The spelling of 198016589 in words is "one hundred ninety-eight million, sixteen thousand, five hundred eighty-nine".