204313009 has 2 divisors, whose sum is σ = 204313010. Its totient is φ = 204313008.

The previous prime is 204312961. The next prime is 204313013. The reversal of 204313009 is 900313402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124389409 + 79923600 = 11153^2 + 8940^2 .

It is a cyclic number.

It is not a de Polignac number, because 204313009 - 2⁹ = 204312497 is a prime.

It is not a weakly prime, because it can be changed into another prime (204313019) 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, 102156504 + 102156505.

It is an arithmetic number, because the mean of its divisors is an integer number (102156505).

Almost surely, 2^204313009 is an apocalyptic number.

It is an amenable number.

204313009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204313009 is an equidigital number, since it uses as much as digits as its factorization.

204313009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 204313009 is about 14293.8101638436. The cubic root of 204313009 is about 588.9774579824.

The spelling of 204313009 in words is "two hundred four million, three hundred thirteen thousand, nine".