324664621 has 2 divisors, whose sum is σ = 324664622. Its totient is φ = 324664620.

The previous prime is 324664597. The next prime is 324664661. The reversal of 324664621 is 126466423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176092900 + 148571721 = 13270^2 + 12189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-324664621 is a prime.

It is a super-4 number, since 4×324664621⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324664661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162332310 + 162332311.

It is an arithmetic number, because the mean of its divisors is an integer number (162332311).

Almost surely, 2^324664621 is an apocalyptic number.

It is an amenable number.

324664621 is a deficient number, since it is larger than the sum of its proper divisors (1).

324664621 is an equidigital number, since it uses as much as digits as its factorization.

324664621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

The square root of 324664621 is about 18018.4522365269. The cubic root of 324664621 is about 687.2978551038.

The spelling of 324664621 in words is "three hundred twenty-four million, six hundred sixty-four thousand, six hundred twenty-one".