204749705 has 4 divisors (see below), whose sum is σ = 245699652. Its totient is φ = 163799760.

The previous prime is 204749669. The next prime is 204749711. The reversal of 204749705 is 507947402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58049161 + 146700544 = 7619^2 + 12112^2 .

It is not a de Polignac number, because 204749705 - 2¹⁰ = 204748681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20474966 + ... + 20474975.

It is an arithmetic number, because the mean of its divisors is an integer number (61424913).

Almost surely, 2^204749705 is an apocalyptic number.

It is an amenable number.

204749705 is a deficient number, since it is larger than the sum of its proper divisors (40949947).

204749705 is an equidigital number, since it uses as much as digits as its factorization.

204749705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40949946.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 204749705 is about 14309.0777131162. The cubic root of 204749705 is about 589.3967836538.

The spelling of 204749705 in words is "two hundred four million, seven hundred forty-nine thousand, seven hundred five".