13687943 has 2 divisors, whose sum is σ = 13687944. Its totient is φ = 13687942.

The previous prime is 13687937. The next prime is 13687969. The reversal of 13687943 is 34978631.

13687943 is digitally balanced in base 2, 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 not a de Polignac number, because 13687943 - 2⁶ = 13687879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13687943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13687903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6843971 + 6843972.

It is an arithmetic number, because the mean of its divisors is an integer number (6843972).

Almost surely, 2^13687943 is an apocalyptic number.

13687943 is a deficient number, since it is larger than the sum of its proper divisors (1).

13687943 is an equidigital number, since it uses as much as digits as its factorization.

13687943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 13687943 is about 3699.7220165845. The cubic root of 13687943 is about 239.2100357735.

The spelling of 13687943 in words is "thirteen million, six hundred eighty-seven thousand, nine hundred forty-three".