323889913 has 2 divisors, whose sum is σ = 323889914. Its totient is φ = 323889912.

The previous prime is 323889911. The next prime is 323889949. The reversal of 323889913 is 319988323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323028729 + 861184 = 17973^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 323889913 - 2¹ = 323889911 is a prime.

Together with 323889911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (323889911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161944956 + 161944957.

It is an arithmetic number, because the mean of its divisors is an integer number (161944957).

Almost surely, 2^323889913 is an apocalyptic number.

It is an amenable number.

323889913 is a deficient number, since it is larger than the sum of its proper divisors (1).

323889913 is an equidigital number, since it uses as much as digits as its factorization.

323889913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 323889913 is about 17996.9417679782. The cubic root of 323889913 is about 686.7507477344.

The spelling of 323889913 in words is "three hundred twenty-three million, eight hundred eighty-nine thousand, nine hundred thirteen".