324640643 has 2 divisors, whose sum is σ = 324640644. Its totient is φ = 324640642.

The previous prime is 324640637. The next prime is 324640681. The reversal of 324640643 is 346046423.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 324640643 - 2⁶ = 324640579 is a prime.

It is not a weakly prime, because it can be changed into another prime (324640633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162320321 + 162320322.

It is an arithmetic number, because the mean of its divisors is an integer number (162320322).

Almost surely, 2^324640643 is an apocalyptic number.

324640643 is a deficient number, since it is larger than the sum of its proper divisors (1).

324640643 is an equidigital number, since it uses as much as digits as its factorization.

324640643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 324640643 is about 18017.7868507761. The cubic root of 324640643 is about 687.2809346341.

The spelling of 324640643 in words is "three hundred twenty-four million, six hundred forty thousand, six hundred forty-three".