328325721209 has 2 divisors, whose sum is σ = 328325721210. Its totient is φ = 328325721208.

The previous prime is 328325721203. The next prime is 328325721391. The reversal of 328325721209 is 902127523823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328268264809 + 57456400 = 572947^2 + 7580^2 .

It is a cyclic number.

It is not a de Polignac number, because 328325721209 - 2⁴ = 328325721193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328325721209.

It is not a weakly prime, because it can be changed into another prime (328325721203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164162860604 + 164162860605.

It is an arithmetic number, because the mean of its divisors is an integer number (164162860605).

Almost surely, 2^328325721209 is an apocalyptic number.

It is an amenable number.

328325721209 is a deficient number, since it is larger than the sum of its proper divisors (1).

328325721209 is an equidigital number, since it uses as much as digits as its factorization.

328325721209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 328325721209 in words is "three hundred twenty-eight billion, three hundred twenty-five million, seven hundred twenty-one thousand, two hundred nine".