204959947 has 4 divisors (see below), whose sum is σ = 205817760. Its totient is φ = 204102136.

The previous prime is 204959927. The next prime is 204959959. The reversal of 204959947 is 749959402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204959947 - 2²³ = 196571339 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204959947.

It is not an unprimeable number, because it can be changed into a prime (204959917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428548 + ... + 429025.

It is an arithmetic number, because the mean of its divisors is an integer number (51454440).

Almost surely, 2^204959947 is an apocalyptic number.

204959947 is a deficient number, since it is larger than the sum of its proper divisors (857813).

204959947 is an equidigital number, since it uses as much as digits as its factorization.

204959947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857812.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 204959947 is about 14316.4222835176. The cubic root of 204959947 is about 589.5984503171.

The spelling of 204959947 in words is "two hundred four million, nine hundred fifty-nine thousand, nine hundred forty-seven".