13665143 has 2 divisors, whose sum is σ = 13665144. Its totient is φ = 13665142.

The previous prime is 13665133. The next prime is 13665163. The reversal of 13665143 is 34156631.

It is a happy number.

13665143 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (34156631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13665143 is a prime.

It is a super-2 number, since 2×13665143² = 373472266420898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13665103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832571 + 6832572.

It is an arithmetic number, because the mean of its divisors is an integer number (6832572).

Almost surely, 2^13665143 is an apocalyptic number.

13665143 is a deficient number, since it is larger than the sum of its proper divisors (1).

13665143 is an equidigital number, since it uses as much as digits as its factorization.

13665143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 13665143 is about 3696.6394197974. The cubic root of 13665143 is about 239.0771446139.

The spelling of 13665143 in words is "thirteen million, six hundred sixty-five thousand, one hundred forty-three".