198412589 has 2 divisors, whose sum is σ = 198412590. Its totient is φ = 198412588.

The previous prime is 198412583. The next prime is 198412597. The reversal of 198412589 is 985214891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158508100 + 39904489 = 12590^2 + 6317^2 .

It is an emirp because it is prime and its reverse (985214891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198412589 - 2²⁴ = 181635373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_10995869 and since 198412589 and 10995869 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198412583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99206294 + 99206295.

It is an arithmetic number, because the mean of its divisors is an integer number (99206295).

Almost surely, 2^198412589 is an apocalyptic number.

It is an amenable number.

198412589 is a deficient number, since it is larger than the sum of its proper divisors (1).

198412589 is an equidigital number, since it uses as much as digits as its factorization.

198412589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 47.

The square root of 198412589 is about 14085.9003617092. The cubic root of 198412589 is about 583.2522301031.

The spelling of 198412589 in words is "one hundred ninety-eight million, four hundred twelve thousand, five hundred eighty-nine".