204424123 has 4 divisors (see below), whose sum is σ = 207303408. Its totient is φ = 201544840.

The previous prime is 204424111. The next prime is 204424151. The reversal of 204424123 is 321424402.

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 204424123 - 2⁵ = 204424091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204424094 and 204424103.

It is not an unprimeable number, because it can be changed into a prime (204422123) 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, 1439536 + ... + 1439677.

It is an arithmetic number, because the mean of its divisors is an integer number (51825852).

Almost surely, 2^204424123 is an apocalyptic number.

204424123 is a deficient number, since it is larger than the sum of its proper divisors (2879285).

204424123 is an equidigital number, since it uses as much as digits as its factorization.

204424123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879284.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 204424123 is about 14297.6964228508. The cubic root of 204424123 is about 589.0842088635.

Adding to 204424123 its reverse (321424402), we get a palindrome (525848525).

It can be divided in two parts, 204424 and 123, that multiplied together give a palindrome (25144152).

The spelling of 204424123 in words is "two hundred four million, four hundred twenty-four thousand, one hundred twenty-three".