14303309 has 4 divisors (see below), whose sum is σ = 14925216. Its totient is φ = 13681404.

The previous prime is 14303297. The next prime is 14303323. The reversal of 14303309 is 90330341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14303309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 621883 = 14303309 / (1 + 4 + 3 + 0 + 3 + 3 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14303339) 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, 310919 + ... + 310964.

It is an arithmetic number, because the mean of its divisors is an integer number (3731304).

Almost surely, 2^14303309 is an apocalyptic number.

It is an amenable number.

14303309 is a deficient number, since it is larger than the sum of its proper divisors (621907).

14303309 is an equidigital number, since it uses as much as digits as its factorization.

14303309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621906.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 14303309 is about 3781.9715757790. The cubic root of 14303309 is about 242.7423248153.

The spelling of 14303309 in words is "fourteen million, three hundred three thousand, three hundred nine".