327989 has 4 divisors (see below), whose sum is σ = 332556. Its totient is φ = 323424.

The previous prime is 327983. The next prime is 328007. The reversal of 327989 is 989723.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 280900 + 47089 = 530^2 + 217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-327989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 327989.

It is not an unprimeable number, because it can be changed into a prime (327983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174 + ... + 2319.

It is an arithmetic number, because the mean of its divisors is an integer number (83139).

2³²⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

327989 is a deficient number, since it is larger than the sum of its proper divisors (4567).

327989 is an equidigital number, since it uses as much as digits as its factorization.

327989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566.

The product of its digits is 27216, while the sum is 38.

The square root of 327989 is about 572.7032390340. The cubic root of 327989 is about 68.9635738562.

The spelling of 327989 in words is "three hundred twenty-seven thousand, nine hundred eighty-nine".