204050009 has 2 divisors, whose sum is σ = 204050010. Its totient is φ = 204050008.

The previous prime is 204049961. The next prime is 204050027. The reversal of 204050009 is 900050402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137545984 + 66504025 = 11728^2 + 8155^2 .

It is a cyclic number.

It is not a de Polignac number, because 204050009 - 2⁸ = 204049753 is a prime.

It is not a weakly prime, because it can be changed into another prime (204050069) 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, 102025004 + 102025005.

It is an arithmetic number, because the mean of its divisors is an integer number (102025005).

Almost surely, 2^204050009 is an apocalyptic number.

It is an amenable number.

204050009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204050009 is an equidigital number, since it uses as much as digits as its factorization.

204050009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 204050009 is about 14284.6074149764. The cubic root of 204050009 is about 588.7246309031.

The spelling of 204050009 in words is "two hundred four million, fifty thousand, nine".