204492317 has 2 divisors, whose sum is σ = 204492318. Its totient is φ = 204492316.

The previous prime is 204492271. The next prime is 204492349. The reversal of 204492317 is 713294402.

It is an a-pointer prime, because the next prime (204492349) can be obtained adding 204492317 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136165561 + 68326756 = 11669^2 + 8266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204492317 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 (204492367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102246158 + 102246159.

It is an arithmetic number, because the mean of its divisors is an integer number (102246159).

Almost surely, 2^204492317 is an apocalyptic number.

It is an amenable number.

204492317 is a deficient number, since it is larger than the sum of its proper divisors (1).

204492317 is an equidigital number, since it uses as much as digits as its factorization.

204492317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 204492317 is about 14300.0810137565. The cubic root of 204492317 is about 589.1497059320.

The spelling of 204492317 in words is "two hundred four million, four hundred ninety-two thousand, three hundred seventeen".