12387631903 has 4 divisors (see below), whose sum is σ = 12394950568. Its totient is φ = 12380313240.

The previous prime is 12387631901. The next prime is 12387631969. The reversal of 12387631903 is 30913678321.

It is a happy number.

12387631903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12387631903 - 2¹ = 12387631901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12387631903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387631901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656793 + ... + 3660178.

It is an arithmetic number, because the mean of its divisors is an integer number (3098737642).

Almost surely, 2^12387631903 is an apocalyptic number.

12387631903 is a deficient number, since it is larger than the sum of its proper divisors (7318665).

12387631903 is an equidigital number, since it uses as much as digits as its factorization.

12387631903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7318664.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 12387631903 in words is "twelve billion, three hundred eighty-seven million, six hundred thirty-one thousand, nine hundred three".