12687937 has 4 divisors (see below), whose sum is σ = 12695236. Its totient is φ = 12680640.

The previous prime is 12687889. The next prime is 12687943. The reversal of 12687937 is 73978621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73978621 = 3947 ⋅18743.

It can be written as a sum of positive squares in 2 ways, for example, as 6739216 + 5948721 = 2596^2 + 2439^2 .

It is a cyclic number.

It is not a de Polignac number, because 12687937 - 2¹¹ = 12685889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12687893 and 12687902.

It is not an unprimeable number, because it can be changed into a prime (12687947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (3173809).

Almost surely, 2^12687937 is an apocalyptic number.

It is an amenable number.

12687937 is a deficient number, since it is larger than the sum of its proper divisors (7299).

12687937 is an equidigital number, since it uses as much as digits as its factorization.

12687937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7298.

The product of its digits is 127008, while the sum is 43.

The square root of 12687937 is about 3562.0130544399. The cubic root of 12687937 is about 233.2367625316.

The spelling of 12687937 in words is "twelve million, six hundred eighty-seven thousand, nine hundred thirty-seven".