198382589 has 2 divisors, whose sum is σ = 198382590. Its totient is φ = 198382588.

The previous prime is 198382549. The next prime is 198382627. The reversal of 198382589 is 985283891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122988100 + 75394489 = 11090^2 + 8683^2 .

It is an emirp because it is prime and its reverse (985283891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198382589 - 2²⁰ = 197334013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198382589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198382529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99191294 + 99191295.

It is an arithmetic number, because the mean of its divisors is an integer number (99191295).

Almost surely, 2^198382589 is an apocalyptic number.

It is an amenable number.

198382589 is a deficient number, since it is larger than the sum of its proper divisors (1).

198382589 is an equidigital number, since it uses as much as digits as its factorization.

198382589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 53.

The square root of 198382589 is about 14084.8354267986. The cubic root of 198382589 is about 583.2228326928. Note that the first 3 decimals are identical.

The spelling of 198382589 in words is "one hundred ninety-eight million, three hundred eighty-two thousand, five hundred eighty-nine".