12687863 has 2 divisors, whose sum is σ = 12687864. Its totient is φ = 12687862.

The previous prime is 12687853. The next prime is 12687869. The reversal of 12687863 is 36878621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12687863 - 2⁴ = 12687847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12687863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12687869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343931 + 6343932.

It is an arithmetic number, because the mean of its divisors is an integer number (6343932).

Almost surely, 2^12687863 is an apocalyptic number.

12687863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12687863 is an equidigital number, since it uses as much as digits as its factorization.

12687863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 12687863 is about 3562.0026670400. The cubic root of 12687863 is about 233.2363090943.

The spelling of 12687863 in words is "twelve million, six hundred eighty-seven thousand, eight hundred sixty-three".