328885321 has 2 divisors, whose sum is σ = 328885322. Its totient is φ = 328885320.

The previous prime is 328885301. The next prime is 328885331. The reversal of 328885321 is 123588823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311910921 + 16974400 = 17661^2 + 4120^2 .

It is an emirp because it is prime and its reverse (123588823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328885321 - 2¹⁵ = 328852553 is a prime.

It is not a weakly prime, because it can be changed into another prime (328885301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164442660 + 164442661.

It is an arithmetic number, because the mean of its divisors is an integer number (164442661).

Almost surely, 2^328885321 is an apocalyptic number.

It is an amenable number.

328885321 is a deficient number, since it is larger than the sum of its proper divisors (1).

328885321 is an equidigital number, since it uses as much as digits as its factorization.

328885321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 40.

The square root of 328885321 is about 18135.1956427274. The cubic root of 328885321 is about 690.2633742170.

The spelling of 328885321 in words is "three hundred twenty-eight million, eight hundred eighty-five thousand, three hundred twenty-one".