204906017 has 2 divisors, whose sum is σ = 204906018. Its totient is φ = 204906016.

The previous prime is 204905999. The next prime is 204906047. The reversal of 204906017 is 710609402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115111441 + 89794576 = 10729^2 + 9476^2 .

It is a cyclic number.

It is not a de Polignac number, because 204906017 - 2¹⁰ = 204904993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204906047) 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, 102453008 + 102453009.

It is an arithmetic number, because the mean of its divisors is an integer number (102453009).

Almost surely, 2^204906017 is an apocalyptic number.

It is an amenable number.

204906017 is a deficient number, since it is larger than the sum of its proper divisors (1).

204906017 is an equidigital number, since it uses as much as digits as its factorization.

204906017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 204906017 is about 14314.5386583012. The cubic root of 204906017 is about 589.5467331659.

The spelling of 204906017 in words is "two hundred four million, nine hundred six thousand, seventeen".