323243993 has 2 divisors, whose sum is σ = 323243994. Its totient is φ = 323243992.

The previous prime is 323243983. The next prime is 323244059. The reversal of 323243993 is 399342323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322094809 + 1149184 = 17947^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 323243993 - 2¹² = 323239897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (323243983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161621996 + 161621997.

It is an arithmetic number, because the mean of its divisors is an integer number (161621997).

Almost surely, 2^323243993 is an apocalyptic number.

It is an amenable number.

323243993 is a deficient number, since it is larger than the sum of its proper divisors (1).

323243993 is an equidigital number, since it uses as much as digits as its factorization.

323243993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 38.

The square root of 323243993 is about 17978.9875410158. The cubic root of 323243993 is about 686.2939245698.

The spelling of 323243993 in words is "three hundred twenty-three million, two hundred forty-three thousand, nine hundred ninety-three".