12387663 has 6 divisors (see below), whose sum is σ = 17893304. Its totient is φ = 8258436.

The previous prime is 12387659. The next prime is 12387671. The reversal of 12387663 is 36678321.

It is a happy number.

It is not a de Polignac number, because 12387663 - 2² = 12387659 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 (12387623) 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, 688195 + ... + 688212.

Almost surely, 2^12387663 is an apocalyptic number.

12387663 is a deficient number, since it is larger than the sum of its proper divisors (5505641).

12387663 is a wasteful number, since it uses less digits than its factorization.

12387663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376413 (or 1376410 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 12387663 is about 3519.6112001186. The cubic root of 12387663 is about 231.3821189999.

It can be divided in two parts, 1238766 and 3, that added together give a square (1238769 = 1113²).

The spelling of 12387663 in words is "twelve million, three hundred eighty-seven thousand, six hundred sixty-three".