323509 has 2 divisors, whose sum is σ = 323510. Its totient is φ = 323508.

The previous prime is 323507. The next prime is 323537. The reversal of 323509 is 905323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180625 + 142884 = 425^2 + 378^2 .

It is a cyclic number.

It is not a de Polignac number, because 323509 - 2¹ = 323507 is a prime.

Together with 323507, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 323509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161754 + 161755.

It is an arithmetic number, because the mean of its divisors is an integer number (161755).

2³²³⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

323509 is a deficient number, since it is larger than the sum of its proper divisors (1).

323509 is an equidigital number, since it uses as much as digits as its factorization.

323509 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 323509 is about 568.7785157687. The cubic root of 323509 is about 68.6481422785.

The spelling of 323509 in words is "three hundred twenty-three thousand, five hundred nine".