204052109 has 2 divisors, whose sum is σ = 204052110. Its totient is φ = 204052108.

The previous prime is 204052087. The next prime is 204052129. The reversal of 204052109 is 901250402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 81396484 = 11075^2 + 9022^2 .

It is a cyclic number.

It is not a de Polignac number, because 204052109 - 2⁸ = 204051853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204052129) 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, 102026054 + 102026055.

It is an arithmetic number, because the mean of its divisors is an integer number (102026055).

Almost surely, 2^204052109 is an apocalyptic number.

It is an amenable number.

204052109 is a deficient number, since it is larger than the sum of its proper divisors (1).

204052109 is an equidigital number, since it uses as much as digits as its factorization.

204052109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 204052109 is about 14284.6809204826. The cubic root of 204052109 is about 588.7266505346.

The spelling of 204052109 in words is "two hundred four million, fifty-two thousand, one hundred nine".