204804123 has 4 divisors (see below), whose sum is σ = 273072168. Its totient is φ = 136536080.

The previous prime is 204804113. The next prime is 204804161. The reversal of 204804123 is 321408402.

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 204804123 - 2⁴ = 204804107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204804093 and 204804102.

It is not an unprimeable number, because it can be changed into a prime (204804113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34134018 + ... + 34134023.

It is an arithmetic number, because the mean of its divisors is an integer number (68268042).

Almost surely, 2^204804123 is an apocalyptic number.

204804123 is a deficient number, since it is larger than the sum of its proper divisors (68268045).

204804123 is an equidigital number, since it uses as much as digits as its factorization.

204804123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68268044.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 204804123 is about 14310.9791069654. The cubic root of 204804123 is about 589.4489952929.

The spelling of 204804123 in words is "two hundred four million, eight hundred four thousand, one hundred twenty-three".