13767681 has 16 divisors (see below), whose sum is σ = 18817920. Its totient is φ = 8951040.

The previous prime is 13767679. The next prime is 13767703. The reversal of 13767681 is 18676731.

13767681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13767681 - 2¹ = 13767679 is a prime.

It is a super-2 number, since 2×13767681² = 379098080235522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13767631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22921 + ... + 23513.

It is an arithmetic number, because the mean of its divisors is an integer number (1176120).

Almost surely, 2^13767681 is an apocalyptic number.

It is an amenable number.

13767681 is a deficient number, since it is larger than the sum of its proper divisors (5050239).

13767681 is a wasteful number, since it uses less digits than its factorization.

13767681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776.

The product of its digits is 42336, while the sum is 39.

The square root of 13767681 is about 3710.4825831689. The cubic root of 13767681 is about 239.6736362569.

The spelling of 13767681 in words is "thirteen million, seven hundred sixty-seven thousand, six hundred eighty-one".