13766689 has 4 divisors (see below), whose sum is σ = 13777456. Its totient is φ = 13755924.

The previous prime is 13766681. The next prime is 13766713. The reversal of 13766689 is 98666731.

13766689 is digitally balanced in base 3, 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98666731 = 5641 ⋅17491.

It is a cyclic number.

It is not a de Polignac number, because 13766689 - 2³ = 13766681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13766681) 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 3 ways as a sum of consecutive naturals, for example, 3159 + ... + 6124.

It is an arithmetic number, because the mean of its divisors is an integer number (3444364).

Almost surely, 2^13766689 is an apocalyptic number.

It is an amenable number.

13766689 is a deficient number, since it is larger than the sum of its proper divisors (10767).

13766689 is an equidigital number, since it uses as much as digits as its factorization.

13766689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766.

The product of its digits is 326592, while the sum is 46.

The square root of 13766689 is about 3710.3489054266. The cubic root of 13766689 is about 239.6678797329.

The spelling of 13766689 in words is "thirteen million, seven hundred sixty-six thousand, six hundred eighty-nine".