204574661 has 2 divisors, whose sum is σ = 204574662. Its totient is φ = 204574660.

The previous prime is 204574639. The next prime is 204574681. The reversal of 204574661 is 166475402.

204574661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198274561 + 6300100 = 14081^2 + 2510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204574661 is a prime.

It is a Chen prime.

It is a congruent number.

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, 102287330 + 102287331.

It is an arithmetic number, because the mean of its divisors is an integer number (102287331).

Almost surely, 2^204574661 is an apocalyptic number.

It is an amenable number.

204574661 is a deficient number, since it is larger than the sum of its proper divisors (1).

204574661 is an equidigital number, since it uses as much as digits as its factorization.

204574661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 204574661 is about 14302.9598685027. The cubic root of 204574661 is about 589.2287739933.

The spelling of 204574661 in words is "two hundred four million, five hundred seventy-four thousand, six hundred sixty-one".