204447149 has 2 divisors, whose sum is σ = 204447150. Its totient is φ = 204447148.

The previous prime is 204447143. The next prime is 204447157. The reversal of 204447149 is 941744402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204204100 + 243049 = 14290^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 204447149 - 2¹² = 204443053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204447143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102223574 + 102223575.

It is an arithmetic number, because the mean of its divisors is an integer number (102223575).

Almost surely, 2^204447149 is an apocalyptic number.

It is an amenable number.

204447149 is a deficient number, since it is larger than the sum of its proper divisors (1).

204447149 is an equidigital number, since it uses as much as digits as its factorization.

204447149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 204447149 is about 14298.5016347868. The cubic root of 204447149 is about 589.1063258614.

The spelling of 204447149 in words is "two hundred four million, four hundred forty-seven thousand, one hundred forty-nine".