12684663 has 6 divisors (see below), whose sum is σ = 18322304. Its totient is φ = 8456436.

The previous prime is 12684653. The next prime is 12684667. The reversal of 12684663 is 36648621.

12684663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12684663 - 2¹⁶ = 12619127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 704695 + ... + 704712.

Almost surely, 2^12684663 is an apocalyptic number.

12684663 is a deficient number, since it is larger than the sum of its proper divisors (5637641).

12684663 is a wasteful number, since it uses less digits than its factorization.

12684663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409413 (or 1409410 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 12684663 is about 3561.5534531999. The cubic root of 12684663 is about 233.2166993054.

The spelling of 12684663 in words is "twelve million, six hundred eighty-four thousand, six hundred sixty-three".