423043321 has 2 divisors, whose sum is σ = 423043322. Its totient is φ = 423043320.

The previous prime is 423043277. The next prime is 423043337. The reversal of 423043321 is 123340324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334890000 + 88153321 = 18300^2 + 9389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423043321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423043292 and 423043301.

It is not a weakly prime, because it can be changed into another prime (423043121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211521660 + 211521661.

It is an arithmetic number, because the mean of its divisors is an integer number (211521661).

Almost surely, 2^423043321 is an apocalyptic number.

It is an amenable number.

423043321 is a deficient number, since it is larger than the sum of its proper divisors (1).

423043321 is an equidigital number, since it uses as much as digits as its factorization.

423043321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 423043321 is about 20568.0169437892. The cubic root of 423043321 is about 750.6917002420.

Adding to 423043321 its reverse (123340324), we get a palindrome (546383645).

The spelling of 423043321 in words is "four hundred twenty-three million, forty-three thousand, three hundred twenty-one".