13668893 has 10 divisors (see below), whose sum is σ = 15948894. Its totient is φ = 11714136.

The previous prime is 13668881. The next prime is 13668911. The reversal of 13668893 is 39886631.

It can be written as a sum of positive squares in only one way, i.e., 9229444 + 4439449 = 3038^2 + 2107^2 .

It is not a de Polignac number, because 13668893 - 2⁸ = 13668637 is a prime.

It is a Duffinian number.

It is a Curzon 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 9 ways as a sum of consecutive naturals, for example, 446 + ... + 5247.

Almost surely, 2^13668893 is an apocalyptic number.

It is an amenable number.

13668893 is a deficient number, since it is larger than the sum of its proper divisors (2280001).

13668893 is an frugal number, since it uses more digits than its factorization.

13668893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721 (or 5700 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 13668893 is about 3697.1466024490. The cubic root of 13668893 is about 239.0990118639.

The spelling of 13668893 in words is "thirteen million, six hundred sixty-eight thousand, eight hundred ninety-three".