14387809 has 2 divisors, whose sum is σ = 14387810. Its totient is φ = 14387808.

The previous prime is 14387777. The next prime is 14387819. The reversal of 14387809 is 90878341.

14387809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 4950625 = 3072^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 14387809 - 2⁵ = 14387777 is a prime.

It is not a weakly prime, because it can be changed into another prime (14387819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7193904 + 7193905.

It is an arithmetic number, because the mean of its divisors is an integer number (7193905).

Almost surely, 2^14387809 is an apocalyptic number.

It is an amenable number.

14387809 is a deficient number, since it is larger than the sum of its proper divisors (1).

14387809 is an equidigital number, since it uses as much as digits as its factorization.

14387809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 14387809 is about 3793.1265467949. The cubic root of 14387809 is about 243.2194047684.

The spelling of 14387809 in words is "fourteen million, three hundred eighty-seven thousand, eight hundred nine".