328891 has 2 divisors, whose sum is σ = 328892. Its totient is φ = 328890.

The previous prime is 328883. The next prime is 328897. The reversal of 328891 is 198823.

It is a strong prime.

It is an emirp because it is prime and its reverse (198823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328891 - 2³ = 328883 is a prime.

328891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (328897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164445 + 164446.

It is an arithmetic number, because the mean of its divisors is an integer number (164446).

2³²⁸⁸⁹¹ is an apocalyptic number.

328891 is a deficient number, since it is larger than the sum of its proper divisors (1).

328891 is an equidigital number, since it uses as much as digits as its factorization.

328891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 328891 is about 573.4901917208. The cubic root of 328891 is about 69.0267347216.

The spelling of 328891 in words is "three hundred twenty-eight thousand, eight hundred ninety-one".