204189589 has 2 divisors, whose sum is σ = 204189590. Its totient is φ = 204189588.

The previous prime is 204189581. The next prime is 204189593. The reversal of 204189589 is 985981402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188650225 + 15539364 = 13735^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 204189589 - 2³ = 204189581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204189581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102094794 + 102094795.

It is an arithmetic number, because the mean of its divisors is an integer number (102094795).

Almost surely, 2^204189589 is an apocalyptic number.

It is an amenable number.

204189589 is a deficient number, since it is larger than the sum of its proper divisors (1).

204189589 is an equidigital number, since it uses as much as digits as its factorization.

204189589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 204189589 is about 14289.4922582995. The cubic root of 204189589 is about 588.8588389410.

The spelling of 204189589 in words is "two hundred four million, one hundred eighty-nine thousand, five hundred eighty-nine".