12688849 has 4 divisors (see below), whose sum is σ = 12717936. Its totient is φ = 12659764.

The previous prime is 12688829. The next prime is 12688859. The reversal of 12688849 is 94888621.

12688849 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12688849 - 2¹¹ = 12686801 is a prime.

It is a super-2 number, since 2×12688849² = 322013777889602, 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 = 12688799 and 12688808.

It is not an unprimeable number, because it can be changed into a prime (12688829) 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, 13879 + ... + 14764.

It is an arithmetic number, because the mean of its divisors is an integer number (3179484).

Almost surely, 2^12688849 is an apocalyptic number.

It is an amenable number.

12688849 is a deficient number, since it is larger than the sum of its proper divisors (29087).

12688849 is an equidigital number, since it uses as much as digits as its factorization.

12688849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29086.

The product of its digits is 221184, while the sum is 46.

The square root of 12688849 is about 3562.1410696378. The cubic root of 12688849 is about 233.2423506960.

The spelling of 12688849 in words is "twelve million, six hundred eighty-eight thousand, eight hundred forty-nine".