199999589 has 2 divisors, whose sum is σ = 199999590. Its totient is φ = 199999588.

The previous prime is 199999483. The next prime is 199999601. The reversal of 199999589 is 985999991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117007489 + 82992100 = 10817^2 + 9110^2 .

It is a cyclic number.

It is not a de Polignac number, because 199999589 - 2⁸ = 199999333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199999889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999794 + 99999795.

It is an arithmetic number, because the mean of its divisors is an integer number (99999795).

Almost surely, 2^199999589 is an apocalyptic number.

It is an amenable number.

199999589 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999589 is an equidigital number, since it uses as much as digits as its factorization.

199999589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21257640, while the sum is 68.

The square root of 199999589 is about 14142.1210926791. The cubic root of 199999589 is about 584.8031470519.

The spelling of 199999589 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred eighty-nine".