328291889 has 2 divisors, whose sum is σ = 328291890. Its totient is φ = 328291888.

The previous prime is 328291853. The next prime is 328291927. The reversal of 328291889 is 988192823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173712400 + 154579489 = 13180^2 + 12433^2 .

It is a cyclic number.

It is not a de Polignac number, because 328291889 - 2¹² = 328287793 is a prime.

It is not a weakly prime, because it can be changed into another prime (328291589) 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, 164145944 + 164145945.

It is an arithmetic number, because the mean of its divisors is an integer number (164145945).

Almost surely, 2^328291889 is an apocalyptic number.

It is an amenable number.

328291889 is a deficient number, since it is larger than the sum of its proper divisors (1).

328291889 is an equidigital number, since it uses as much as digits as its factorization.

328291889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 328291889 is about 18118.8269211889. The cubic root of 328291889 is about 689.8479599195.

The spelling of 328291889 in words is "three hundred twenty-eight million, two hundred ninety-one thousand, eight hundred eighty-nine".