328983863821 has 2 divisors, whose sum is σ = 328983863822. Its totient is φ = 328983863820.

The previous prime is 328983863809. The next prime is 328983863849. The reversal of 328983863821 is 128368389823.

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., 328781826025 + 202037796 = 573395^2 + 14214^2 .

It is a cyclic number.

It is not a de Polignac number, because 328983863821 - 2⁷ = 328983863693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328983863821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328983863861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164491931910 + 164491931911.

It is an arithmetic number, because the mean of its divisors is an integer number (164491931911).

Almost surely, 2^328983863821 is an apocalyptic number.

It is an amenable number.

328983863821 is a deficient number, since it is larger than the sum of its proper divisors (1).

328983863821 is an equidigital number, since it uses as much as digits as its factorization.

328983863821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23887872, while the sum is 61.

The spelling of 328983863821 in words is "three hundred twenty-eight billion, nine hundred eighty-three million, eight hundred sixty-three thousand, eight hundred twenty-one".