12688911 has 6 divisors (see below), whose sum is σ = 18328440. Its totient is φ = 8459268.

The previous prime is 12688909. The next prime is 12688927. The reversal of 12688911 is 11988621.

12688911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12688911 - 2¹ = 12688909 is a prime.

It is a super-2 number, since 2×12688911² = 322016924731842, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 704931 + ... + 704948.

It is an arithmetic number, because the mean of its divisors is an integer number (3054740).

Almost surely, 2^12688911 is an apocalyptic number.

12688911 is a deficient number, since it is larger than the sum of its proper divisors (5639529).

12688911 is a wasteful number, since it uses less digits than its factorization.

12688911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409885 (or 1409882 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 12688911 is about 3562.1497722583. The cubic root of 12688911 is about 233.2427305834.

The spelling of 12688911 in words is "twelve million, six hundred eighty-eight thousand, nine hundred eleven".