12688637 has 16 divisors (see below), whose sum is σ = 14703360. Its totient is φ = 10850112.

The previous prime is 12688609. The next prime is 12688649. The reversal of 12688637 is 73688621.

It is a happy number.

It is not a de Polignac number, because 12688637 - 2¹⁰ = 12687613 is a prime.

It is a super-2 number, since 2×12688637² = 322003017835538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12688594 and 12688603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11063 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (918960).

Almost surely, 2^12688637 is an apocalyptic number.

It is an amenable number.

12688637 is a deficient number, since it is larger than the sum of its proper divisors (2014723).

12688637 is a wasteful number, since it uses less digits than its factorization.

12688637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its digits is 96768, while the sum is 41.

The square root of 12688637 is about 3562.1113121294. Note that the first 3 decimals coincide. The cubic root of 12688637 is about 233.2410517167.

The spelling of 12688637 in words is "twelve million, six hundred eighty-eight thousand, six hundred thirty-seven".