14309 has 4 divisors (see below), whose sum is σ = 14700. Its totient is φ = 13920.

The previous prime is 14303. The next prime is 14321. The reversal of 14309 is 90341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90341 = 61 ⋅1481.

It can be written as a sum of positive squares in 2 ways, for example, as 4900 + 9409 = 70^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 14309 - 2⁴ = 14293 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14303) 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, 134 + ... + 215.

It is an arithmetic number, because the mean of its divisors is an integer number (3675).

2¹⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

14309 is a deficient number, since it is larger than the sum of its proper divisors (391).

14309 is an equidigital number, since it uses as much as digits as its factorization.

14309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 14309 is about 119.6202324024. The cubic root of 14309 is about 24.2774514649.

Multiplying 14309 by its sum of digits (17), we get a triangular number (243253 = T₆₉₇).

It can be divided in two parts, 14 and 309, that added together give a palindrome (323).

The spelling of 14309 in words is "fourteen thousand, three hundred nine".