204002209 has 2 divisors, whose sum is σ = 204002210. Its totient is φ = 204002208.

The previous prime is 204002173. The next prime is 204002219. The reversal of 204002209 is 902200402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198894609 + 5107600 = 14103^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 204002209 - 2¹³ = 203994017 is a prime.

It is not a weakly prime, because it can be changed into another prime (204002219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102001104 + 102001105.

It is an arithmetic number, because the mean of its divisors is an integer number (102001105).

Almost surely, 2^204002209 is an apocalyptic number.

It is an amenable number.

204002209 is a deficient number, since it is larger than the sum of its proper divisors (1).

204002209 is an equidigital number, since it uses as much as digits as its factorization.

204002209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 204002209 is about 14282.9341873440. The cubic root of 204002209 is about 588.6786564951.

The spelling of 204002209 in words is "two hundred four million, two thousand, two hundred nine".