12967681 has 4 divisors (see below), whose sum is σ = 12988864. Its totient is φ = 12946500.

The previous prime is 12967679. The next prime is 12967687. The reversal of 12967681 is 18676921.

12967681 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, and also an emirpimes, since its reverse is a distinct semiprime: 18676921 = 43 ⋅434347.

It is a cyclic number.

It is not a de Polignac number, because 12967681 - 2¹ = 12967679 is a prime.

It is a super-2 number, since 2×12967681² = 336321501035522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12967687) 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, 9645 + ... + 10906.

It is an arithmetic number, because the mean of its divisors is an integer number (3247216).

Almost surely, 2^12967681 is an apocalyptic number.

It is an amenable number.

12967681 is a deficient number, since it is larger than the sum of its proper divisors (21183).

12967681 is an equidigital number, since it uses as much as digits as its factorization.

12967681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21182.

The product of its digits is 36288, while the sum is 40.

The square root of 12967681 is about 3601.0666475365. The cubic root of 12967681 is about 234.9384537784.

The spelling of 12967681 in words is "twelve million, nine hundred sixty-seven thousand, six hundred eighty-one".