13889047 has 4 divisors (see below), whose sum is σ = 13919256. Its totient is φ = 13858840.

The previous prime is 13889041. The next prime is 13889059. The reversal of 13889047 is 74098831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74098831 = 83 ⋅892757.

It is a cyclic number.

It is not a de Polignac number, because 13889047 - 2³ = 13889039 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13889041) 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, 14404 + ... + 15337.

It is an arithmetic number, because the mean of its divisors is an integer number (3479814).

Almost surely, 2^13889047 is an apocalyptic number.

13889047 is a deficient number, since it is larger than the sum of its proper divisors (30209).

13889047 is an equidigital number, since it uses as much as digits as its factorization.

13889047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30208.

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

The square root of 13889047 is about 3726.8011752708. The cubic root of 13889047 is about 240.3758405238.

The spelling of 13889047 in words is "thirteen million, eight hundred eighty-nine thousand, forty-seven".