204747149 has 2 divisors, whose sum is σ = 204747150. Its totient is φ = 204747148.

The previous prime is 204747107. The next prime is 204747187. The reversal of 204747149 is 941747402.

It is an a-pointer prime, because the next prime (204747187) can be obtained adding 204747149 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128097124 + 76650025 = 11318^2 + 8755^2 .

It is a cyclic number.

It is not a de Polignac number, because 204747149 - 2¹⁶ = 204681613 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 (204747199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102373574 + 102373575.

It is an arithmetic number, because the mean of its divisors is an integer number (102373575).

Almost surely, 2^204747149 is an apocalyptic number.

It is an amenable number.

204747149 is a deficient number, since it is larger than the sum of its proper divisors (1).

204747149 is an equidigital number, since it uses as much as digits as its factorization.

204747149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 204747149 is about 14308.9883989051. The cubic root of 204747149 is about 589.3943310586.

The spelling of 204747149 in words is "two hundred four million, seven hundred forty-seven thousand, one hundred forty-nine".