14678809 has 2 divisors, whose sum is σ = 14678810. Its totient is φ = 14678808.

The previous prime is 14678801. The next prime is 14678821. The reversal of 14678809 is 90887641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11923209 + 2755600 = 3453^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 14678809 - 2³ = 14678801 is a prime.

It is not a weakly prime, because it can be changed into another prime (14678801) 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 as a sum of consecutive naturals, namely, 7339404 + 7339405.

It is an arithmetic number, because the mean of its divisors is an integer number (7339405).

Almost surely, 2^14678809 is an apocalyptic number.

It is an amenable number.

14678809 is a deficient number, since it is larger than the sum of its proper divisors (1).

14678809 is an equidigital number, since it uses as much as digits as its factorization.

14678809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 14678809 is about 3831.2933847462. The cubic root of 14678809 is about 244.8482136319.

The spelling of 14678809 in words is "fourteen million, six hundred seventy-eight thousand, eight hundred nine".