323149661 has 2 divisors, whose sum is σ = 323149662. Its totient is φ = 323149660.

The previous prime is 323149657. The next prime is 323149679. The reversal of 323149661 is 166941323.

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., 312193561 + 10956100 = 17669^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 323149661 - 2² = 323149657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323149061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161574830 + 161574831.

It is an arithmetic number, because the mean of its divisors is an integer number (161574831).

Almost surely, 2^323149661 is an apocalyptic number.

It is an amenable number.

323149661 is a deficient number, since it is larger than the sum of its proper divisors (1).

323149661 is an equidigital number, since it uses as much as digits as its factorization.

323149661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 323149661 is about 17976.3639538145. The cubic root of 323149661 is about 686.2271578977.

The spelling of 323149661 in words is "three hundred twenty-three million, one hundred forty-nine thousand, six hundred sixty-one".