423340432321 has 2 divisors, whose sum is σ = 423340432322. Its totient is φ = 423340432320.

The previous prime is 423340432297. The next prime is 423340432343. The reversal of 423340432321 is 123234043324.

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., 360384102400 + 62956329921 = 600320^2 + 250911^2 .

It is a cyclic number.

It is not a de Polignac number, because 423340432321 - 2¹¹ = 423340430273 is a prime.

It is not a weakly prime, because it can be changed into another prime (423340435321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211670216160 + 211670216161.

It is an arithmetic number, because the mean of its divisors is an integer number (211670216161).

Almost surely, 2^423340432321 is an apocalyptic number.

It is an amenable number.

423340432321 is a deficient number, since it is larger than the sum of its proper divisors (1).

423340432321 is an equidigital number, since it uses as much as digits as its factorization.

423340432321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 423340432321 its reverse (123234043324), we get a palindrome (546574475645).

The spelling of 423340432321 in words is "four hundred twenty-three billion, three hundred forty million, four hundred thirty-two thousand, three hundred twenty-one".