13664143 has 2 divisors, whose sum is σ = 13664144. Its totient is φ = 13664142.

The previous prime is 13664129. The next prime is 13664159. The reversal of 13664143 is 34146631.

13664143 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13664143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13664543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832071 + 6832072.

It is an arithmetic number, because the mean of its divisors is an integer number (6832072).

Almost surely, 2^13664143 is an apocalyptic number.

13664143 is a deficient number, since it is larger than the sum of its proper divisors (1).

13664143 is an equidigital number, since it uses as much as digits as its factorization.

13664143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 13664143 is about 3696.5041593376. The cubic root of 13664143 is about 239.0713126716.

The spelling of 13664143 in words is "thirteen million, six hundred sixty-four thousand, one hundred forty-three".