204349839 has 4 divisors (see below), whose sum is σ = 272466456. Its totient is φ = 136233224.

The previous prime is 204349823. The next prime is 204349891. The reversal of 204349839 is 938943402.

It is a happy number.

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 204349839 - 2⁴ = 204349823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204349839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204347839) by changing a digit.

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, 34058304 + ... + 34058309.

It is an arithmetic number, because the mean of its divisors is an integer number (68116614).

Almost surely, 2^204349839 is an apocalyptic number.

204349839 is a deficient number, since it is larger than the sum of its proper divisors (68116617).

204349839 is an equidigital number, since it uses as much as digits as its factorization.

204349839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68116616.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 204349839 is about 14295.0984256842. The cubic root of 204349839 is about 589.0128460643.

The spelling of 204349839 in words is "two hundred four million, three hundred forty-nine thousand, eight hundred thirty-nine".