204040589 has 2 divisors, whose sum is σ = 204040590. Its totient is φ = 204040588.

The previous prime is 204040541. The next prime is 204040649. The reversal of 204040589 is 985040402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165971689 + 38068900 = 12883^2 + 6170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204040589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204040789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102020294 + 102020295.

It is an arithmetic number, because the mean of its divisors is an integer number (102020295).

Almost surely, 2^204040589 is an apocalyptic number.

It is an amenable number.

204040589 is a deficient number, since it is larger than the sum of its proper divisors (1).

204040589 is an equidigital number, since it uses as much as digits as its factorization.

204040589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 204040589 is about 14284.2776856234. The cubic root of 204040589 is about 588.7155712426.

The spelling of 204040589 in words is "two hundred four million, forty thousand, five hundred eighty-nine".