13889143 has 2 divisors, whose sum is σ = 13889144. Its totient is φ = 13889142.

The previous prime is 13889089. The next prime is 13889159. The reversal of 13889143 is 34198831.

It is a strong prime.

It is an emirp because it is prime and its reverse (34198831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13889143 - 2²¹ = 11791991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13881143) 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, 6944571 + 6944572.

It is an arithmetic number, because the mean of its divisors is an integer number (6944572).

Almost surely, 2^13889143 is an apocalyptic number.

13889143 is a deficient number, since it is larger than the sum of its proper divisors (1).

13889143 is an equidigital number, since it uses as much as digits as its factorization.

13889143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 13889143 is about 3726.8140549268. The cubic root of 13889143 is about 240.3763943422.

The spelling of 13889143 in words is "thirteen million, eight hundred eighty-nine thousand, one hundred forty-three".