423304421 has 4 divisors (see below), whose sum is σ = 423673344. Its totient is φ = 422935500.

The previous prime is 423304417. The next prime is 423304423. The reversal of 423304421 is 124403324.

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 a cyclic number.

It is not a de Polignac number, because 423304421 - 2² = 423304417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423304423) 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, 182735 + ... + 185036.

It is an arithmetic number, because the mean of its divisors is an integer number (105918336).

Almost surely, 2^423304421 is an apocalyptic number.

It is an amenable number.

423304421 is a deficient number, since it is larger than the sum of its proper divisors (368923).

423304421 is a wasteful number, since it uses less digits than its factorization.

423304421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368922.

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

The square root of 423304421 is about 20574.3631979218. The cubic root of 423304421 is about 750.8461094025.

Adding to 423304421 its reverse (124403324), we get a palindrome (547707745).

The spelling of 423304421 in words is "four hundred twenty-three million, three hundred four thousand, four hundred twenty-one".