320539 has 2 divisors, whose sum is σ = 320540. Its totient is φ = 320538.

The previous prime is 320533. The next prime is 320561. The reversal of 320539 is 935023.

It is an a-pointer prime, because the next prime (320561) can be obtained adding 320539 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (935023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320539 - 2⁹ = 320027 is a prime.

It is not a weakly prime, because it can be changed into another prime (320533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160269 + 160270.

It is an arithmetic number, because the mean of its divisors is an integer number (160270).

2³²⁰⁵³⁹ is an apocalyptic number.

320539 is a deficient number, since it is larger than the sum of its proper divisors (1).

320539 is an equidigital number, since it uses as much as digits as its factorization.

320539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 320539 is about 566.1616376972. The cubic root of 320539 is about 68.4374195352.

The spelling of 320539 in words is "three hundred twenty thousand, five hundred thirty-nine".