323389921 has 2 divisors, whose sum is σ = 323389922. Its totient is φ = 323389920.

The previous prime is 323389909. The next prime is 323389967. The reversal of 323389921 is 129983323.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318122896 + 5267025 = 17836^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 323389921 - 2⁵ = 323389889 is a prime.

It is not a weakly prime, because it can be changed into another prime (323389901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161694960 + 161694961.

It is an arithmetic number, because the mean of its divisors is an integer number (161694961).

Almost surely, 2^323389921 is an apocalyptic number.

It is an amenable number.

323389921 is a deficient number, since it is larger than the sum of its proper divisors (1).

323389921 is an equidigital number, since it uses as much as digits as its factorization.

323389921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 323389921 is about 17983.0453761314. The cubic root of 323389921 is about 686.3971844756.

The spelling of 323389921 in words is "three hundred twenty-three million, three hundred eighty-nine thousand, nine hundred twenty-one".