320309 has 8 divisors (see below), whose sum is σ = 359328. Its totient is φ = 282960.

The previous prime is 320303. The next prime is 320317. The reversal of 320309 is 903023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320309 - 2⁴ = 320293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320309.

It is not an unprimeable number, because it can be changed into a prime (320303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 800.

It is an arithmetic number, because the mean of its divisors is an integer number (44916).

2³²⁰³⁰⁹ is an apocalyptic number.

It is an amenable number.

320309 is a deficient number, since it is larger than the sum of its proper divisors (39019).

320309 is a wasteful number, since it uses less digits than its factorization.

320309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 320309 is about 565.9584790424. The cubic root of 320309 is about 68.4210467248.

The spelling of 320309 in words is "three hundred twenty thousand, three hundred nine".