11967681 has 8 divisors (see below), whose sum is σ = 17407584. Its totient is φ = 7253120.

The previous prime is 11967679. The next prime is 11967707. The reversal of 11967681 is 18676911.

11967681 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11967681 - 2¹ = 11967679 is a prime.

It is a super-2 number, since 2×11967681² = 286450777035522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11967611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181296 + ... + 181361.

It is an arithmetic number, because the mean of its divisors is an integer number (2175948).

Almost surely, 2^11967681 is an apocalyptic number.

11967681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11967681 is a deficient number, since it is larger than the sum of its proper divisors (5439903).

11967681 is a wasteful number, since it uses less digits than its factorization.

11967681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362671.

The product of its digits is 18144, while the sum is 39.

The square root of 11967681 is about 3459.4336241645. The cubic root of 11967681 is about 228.7371302742.

The spelling of 11967681 in words is "eleven million, nine hundred sixty-seven thousand, six hundred eighty-one".