323809 has 4 divisors (see below), whose sum is σ = 325780. Its totient is φ = 321840.

The previous prime is 323803. The next prime is 323819. The reversal of 323809 is 908323.

It is a happy number.

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 140625 + 183184 = 375^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 323809 - 2³ = 323801 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (323801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714 + ... + 1075.

It is an arithmetic number, because the mean of its divisors is an integer number (81445).

2³²³⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

323809 is a deficient number, since it is larger than the sum of its proper divisors (1971).

323809 is a wasteful number, since it uses less digits than its factorization.

323809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 323809 is about 569.0421776986. The cubic root of 323809 is about 68.6693555780.

The spelling of 323809 in words is "three hundred twenty-three thousand, eight hundred nine".