108309 has 8 divisors (see below), whose sum is σ = 146560. Its totient is φ = 71136.

The previous prime is 108301. The next prime is 108343. The reversal of 108309 is 903801.

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

It is not a de Polignac number, because 108309 - 2³ = 108301 is a prime.

It is a Duffinian number.

108309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108301) 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, 9 + ... + 465.

It is an arithmetic number, because the mean of its divisors is an integer number (18320).

2¹⁰⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

108309 is a deficient number, since it is larger than the sum of its proper divisors (38251).

108309 is an equidigital number, since it uses as much as digits as its factorization.

108309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 108309 is about 329.1033272393. The cubic root of 108309 is about 47.6674056210.

The spelling of 108309 in words is "one hundred eight thousand, three hundred nine".