324128813 has 2 divisors, whose sum is σ = 324128814. Its totient is φ = 324128812.

The previous prime is 324128803. The next prime is 324128869. The reversal of 324128813 is 318821423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216031204 + 108097609 = 14698^2 + 10397^2 .

It is a cyclic number.

It is not a de Polignac number, because 324128813 - 2⁸ = 324128557 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 324128813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324128803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162064406 + 162064407.

It is an arithmetic number, because the mean of its divisors is an integer number (162064407).

Almost surely, 2^324128813 is an apocalyptic number.

It is an amenable number.

324128813 is a deficient number, since it is larger than the sum of its proper divisors (1).

324128813 is an equidigital number, since it uses as much as digits as its factorization.

324128813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 324128813 is about 18003.5777833185. The cubic root of 324128813 is about 686.9195545066.

The spelling of 324128813 in words is "three hundred twenty-four million, one hundred twenty-eight thousand, eight hundred thirteen".