14405309 has 8 divisors (see below), whose sum is σ = 14961912. Its totient is φ = 13858560.

The previous prime is 14405269. The next prime is 14405311. The reversal of 14405309 is 90350441.

It can be written as a sum of positive squares in 4 ways, for example, as 1060900 + 13344409 = 1030^2 + 3653^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14405309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14405329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (1870239).

Almost surely, 2^14405309 is an apocalyptic number.

It is an amenable number.

14405309 is a deficient number, since it is larger than the sum of its proper divisors (556603).

14405309 is an equidigital number, since it uses as much as digits as its factorization.

14405309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 14405309 is about 3795.4326499096. The cubic root of 14405309 is about 243.3179746775.

The spelling of 14405309 in words is "fourteen million, four hundred five thousand, three hundred nine".