204443123 has 4 divisors (see below), whose sum is σ = 204533088. Its totient is φ = 204353160.

The previous prime is 204443119. The next prime is 204443131. The reversal of 204443123 is 321344402.

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 204443123 - 2² = 204443119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204443623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41483 + ... + 46148.

It is an arithmetic number, because the mean of its divisors is an integer number (51133272).

Almost surely, 2^204443123 is an apocalyptic number.

204443123 is a deficient number, since it is larger than the sum of its proper divisors (89965).

204443123 is an equidigital number, since it uses as much as digits as its factorization.

204443123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89964.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 204443123 is about 14298.3608501115. The cubic root of 204443123 is about 589.1024589164.

Adding to 204443123 its reverse (321344402), we get a palindrome (525787525).

The spelling of 204443123 in words is "two hundred four million, four hundred forty-three thousand, one hundred twenty-three".