329881 has 4 divisors (see below), whose sum is σ = 333072. Its totient is φ = 326692.

The previous prime is 329873. The next prime is 329891. The reversal of 329881 is 188923.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 329881 - 2³ = 329873 is a prime.

It is a super-2 number, since 2×329881² = 217642948322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (329801) 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, 1435 + ... + 1648.

It is an arithmetic number, because the mean of its divisors is an integer number (83268).

2³²⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

329881 is a deficient number, since it is larger than the sum of its proper divisors (3191).

329881 is a wasteful number, since it uses less digits than its factorization.

329881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190.

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

The square root of 329881 is about 574.3526791093. The cubic root of 329881 is about 69.0959248331.

The spelling of 329881 in words is "three hundred twenty-nine thousand, eight hundred eighty-one".