14278389 has 4 divisors (see below), whose sum is σ = 19037856. Its totient is φ = 9518924.

The previous prime is 14278387. The next prime is 14278391. The reversal of 14278389 is 98387241.

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 an interprime number because it is at equal distance from previous prime (14278387) and next prime (14278391).

It is a cyclic number.

It is not a de Polignac number, because 14278389 - 2¹ = 14278387 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 14278389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14278387) 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 3 ways as a sum of consecutive naturals, for example, 2379729 + ... + 2379734.

It is an arithmetic number, because the mean of its divisors is an integer number (4759464).

Almost surely, 2^14278389 is an apocalyptic number.

It is an amenable number.

14278389 is a deficient number, since it is larger than the sum of its proper divisors (4759467).

14278389 is an equidigital number, since it uses as much as digits as its factorization.

14278389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759466.

The product of its digits is 96768, while the sum is 42.

The square root of 14278389 is about 3778.6755616221. The cubic root of 14278389 is about 242.6012699218.

The spelling of 14278389 in words is "fourteen million, two hundred seventy-eight thousand, three hundred eighty-nine".