423344321 has 4 divisors (see below), whose sum is σ = 425791572. Its totient is φ = 420897072.

The previous prime is 423344309. The next prime is 423344347. The reversal of 423344321 is 123443324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 226924096 + 196420225 = 15064^2 + 14015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423344321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423344351) 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, 1223366 + ... + 1223711.

It is an arithmetic number, because the mean of its divisors is an integer number (106447893).

Almost surely, 2^423344321 is an apocalyptic number.

It is an amenable number.

423344321 is a deficient number, since it is larger than the sum of its proper divisors (2447251).

423344321 is a wasteful number, since it uses less digits than its factorization.

423344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447250.

The product of its digits is 6912, while the sum is 26.

The square root of 423344321 is about 20575.3328284137. The cubic root of 423344321 is about 750.8696998472.

Adding to 423344321 its reverse (123443324), we get a palindrome (546787645).

The spelling of 423344321 in words is "four hundred twenty-three million, three hundred forty-four thousand, three hundred twenty-one".