204590839 has 2 divisors, whose sum is σ = 204590840. Its totient is φ = 204590838.

The previous prime is 204590833. The next prime is 204590887. The reversal of 204590839 is 938095402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204590839 - 2⁹ = 204590327 is a prime.

It is a super-2 number, since 2×204590839² = 83714822805447842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204590833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102295419 + 102295420.

It is an arithmetic number, because the mean of its divisors is an integer number (102295420).

Almost surely, 2^204590839 is an apocalyptic number.

204590839 is a deficient number, since it is larger than the sum of its proper divisors (1).

204590839 is an equidigital number, since it uses as much as digits as its factorization.

204590839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 204590839 is about 14303.5254045987. The cubic root of 204590839 is about 589.2443058808.

The spelling of 204590839 in words is "two hundred four million, five hundred ninety thousand, eight hundred thirty-nine".