204574681 has 2 divisors, whose sum is σ = 204574682. Its totient is φ = 204574680.

The previous prime is 204574661. The next prime is 204574697. The reversal of 204574681 is 186475402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204490000 + 84681 = 14300^2 + 291^2 .

It is a cyclic number.

It is not a de Polignac number, because 204574681 - 2¹⁵ = 204541913 is a prime.

It is a super-2 number, since 2×204574681² = 83701600212503522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204574681.

It is not a weakly prime, because it can be changed into another prime (204574621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102287340 + 102287341.

It is an arithmetic number, because the mean of its divisors is an integer number (102287341).

Almost surely, 2^204574681 is an apocalyptic number.

It is an amenable number.

204574681 is a deficient number, since it is larger than the sum of its proper divisors (1).

204574681 is an equidigital number, since it uses as much as digits as its factorization.

204574681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 204574681 is about 14302.9605676587. The cubic root of 204574681 is about 589.2287931951.

The spelling of 204574681 in words is "two hundred four million, five hundred seventy-four thousand, six hundred eighty-one".