320329 has 2 divisors, whose sum is σ = 320330. Its totient is φ = 320328.

The previous prime is 320317. The next prime is 320339. The reversal of 320329 is 923023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304704 + 15625 = 552^2 + 125^2 .

It is an emirp because it is prime and its reverse (923023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320329 - 2⁹ = 319817 is a prime.

It is a super-2 number, since 2×320329² = 205221336482, which contains 22 as substring.

It is equal to p₂₇₆₄₀ and since 320329 and 27640 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (320339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160164 + 160165.

It is an arithmetic number, because the mean of its divisors is an integer number (160165).

2³²⁰³²⁹ is an apocalyptic number.

It is an amenable number.

320329 is a deficient number, since it is larger than the sum of its proper divisors (1).

320329 is an equidigital number, since it uses as much as digits as its factorization.

320329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 320329 is about 565.9761479073. The cubic root of 320329 is about 68.4224707585.

It can be divided in two parts, 32032 and 9, that added together give a square (32041 = 179²).

The spelling of 320329 in words is "three hundred twenty thousand, three hundred twenty-nine".