423204321 has 4 divisors (see below), whose sum is σ = 564272432. Its totient is φ = 282136212.

The previous prime is 423204317. The next prime is 423204329. The reversal of 423204321 is 123402324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 423204321 - 2² = 423204317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423204329) 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, 70534051 + ... + 70534056.

It is an arithmetic number, because the mean of its divisors is an integer number (141068108).

Almost surely, 2^423204321 is an apocalyptic number.

It is an amenable number.

423204321 is a deficient number, since it is larger than the sum of its proper divisors (141068111).

423204321 is a wasteful number, since it uses less digits than its factorization.

423204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141068110.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 423204321 is about 20571.9304150097. The cubic root of 423204321 is about 750.7869198319.

Adding to 423204321 its reverse (123402324), we get a palindrome (546606645).

The spelling of 423204321 in words is "four hundred twenty-three million, two hundred four thousand, three hundred twenty-one".