323945491 has 2 divisors, whose sum is σ = 323945492. Its totient is φ = 323945490.

The previous prime is 323945483. The next prime is 323945521. The reversal of 323945491 is 194549323.

It is a weak prime.

It is an emirp because it is prime and its reverse (194549323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 323945491 - 2³ = 323945483 is a prime.

It is a super-2 number, since 2×323945491² = 209881362278462162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (323945411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161972745 + 161972746.

It is an arithmetic number, because the mean of its divisors is an integer number (161972746).

Almost surely, 2^323945491 is an apocalyptic number.

323945491 is a deficient number, since it is larger than the sum of its proper divisors (1).

323945491 is an equidigital number, since it uses as much as digits as its factorization.

323945491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 323945491 is about 17998.4857974220. The cubic root of 323945491 is about 686.7900265640.

The spelling of 323945491 in words is "three hundred twenty-three million, nine hundred forty-five thousand, four hundred ninety-one".