13668791 has 4 divisors (see below), whose sum is σ = 13733784. Its totient is φ = 13603800.

The previous prime is 13668779. The next prime is 13668793. The reversal of 13668791 is 19786631.

13668791 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.

It is a cyclic number.

It is not a de Polignac number, because 13668791 - 2⁶ = 13668727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668793) 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, 32180 + ... + 32601.

It is an arithmetic number, because the mean of its divisors is an integer number (3433446).

Almost surely, 2^13668791 is an apocalyptic number.

13668791 is a deficient number, since it is larger than the sum of its proper divisors (64993).

13668791 is an equidigital number, since it uses as much as digits as its factorization.

13668791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64992.

The product of its digits is 54432, while the sum is 41.

The square root of 13668791 is about 3697.1328080014. The cubic root of 13668791 is about 239.0984171276.

The spelling of 13668791 in words is "thirteen million, six hundred sixty-eight thousand, seven hundred ninety-one".