323139989 has 2 divisors, whose sum is σ = 323139990. Its totient is φ = 323139988.

The previous prime is 323139979. The next prime is 323140003. The reversal of 323139989 is 989931323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201214225 + 121925764 = 14185^2 + 11042^2 .

It is a cyclic number.

It is not a de Polignac number, because 323139989 - 2²⁴ = 306362773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323139979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161569994 + 161569995.

It is an arithmetic number, because the mean of its divisors is an integer number (161569995).

Almost surely, 2^323139989 is an apocalyptic number.

It is an amenable number.

323139989 is a deficient number, since it is larger than the sum of its proper divisors (1).

323139989 is an equidigital number, since it uses as much as digits as its factorization.

323139989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 47.

The square root of 323139989 is about 17976.0949318811. The cubic root of 323139989 is about 686.2203114773.

The spelling of 323139989 in words is "three hundred twenty-three million, one hundred thirty-nine thousand, nine hundred eighty-nine".