12813687 has 8 divisors (see below), whose sum is σ = 18983280. Its totient is φ = 8542440.

The previous prime is 12813677. The next prime is 12813701. The reversal of 12813687 is 78631821.

It is not a de Polignac number, because 12813687 - 2¹⁰ = 12812663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813637) 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 7 ways as a sum of consecutive naturals, for example, 237264 + ... + 237317.

It is an arithmetic number, because the mean of its divisors is an integer number (2372910).

Almost surely, 2^12813687 is an apocalyptic number.

12813687 is a deficient number, since it is larger than the sum of its proper divisors (6169593).

12813687 is an equidigital number, since it uses as much as digits as its factorization.

12813687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474590 (or 474584 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12813687 is about 3579.6210693312. The cubic root of 12813687 is about 234.0047665038.

The spelling of 12813687 in words is "twelve million, eight hundred thirteen thousand, six hundred eighty-seven".