204947 has 2 divisors, whose sum is σ = 204948. Its totient is φ = 204946.

The previous prime is 204931. The next prime is 204973. The reversal of 204947 is 749402.

It is an a-pointer prime, because the next prime (204973) can be obtained adding 204947 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204947 - 2⁴ = 204931 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102473 + 102474.

It is an arithmetic number, because the mean of its divisors is an integer number (102474).

2²⁰⁴⁹⁴⁷ is an apocalyptic number.

204947 is a deficient number, since it is larger than the sum of its proper divisors (1).

204947 is an equidigital number, since it uses as much as digits as its factorization.

204947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 204947 is about 452.7107244146. The cubic root of 204947 is about 58.9586035384.

The spelling of 204947 in words is "two hundred four thousand, nine hundred forty-seven".