328939643 has 2 divisors, whose sum is σ = 328939644. Its totient is φ = 328939642.

The previous prime is 328939621. The next prime is 328939687. The reversal of 328939643 is 346939823.

It is a weak prime.

It is an emirp because it is prime and its reverse (346939823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328939643 - 2¹⁶ = 328874107 is a prime.

It is not a weakly prime, because it can be changed into another prime (328939693) 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, 164469821 + 164469822.

It is an arithmetic number, because the mean of its divisors is an integer number (164469822).

Almost surely, 2^328939643 is an apocalyptic number.

328939643 is a deficient number, since it is larger than the sum of its proper divisors (1).

328939643 is an equidigital number, since it uses as much as digits as its factorization.

328939643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The square root of 328939643 is about 18136.6932763390. The cubic root of 328939643 is about 690.3013757334.

The spelling of 328939643 in words is "three hundred twenty-eight million, nine hundred thirty-nine thousand, six hundred forty-three".