13668013 has 4 divisors (see below), whose sum is σ = 13726908. Its totient is φ = 13609120.

The previous prime is 13668007. The next prime is 13668029. The reversal of 13668013 is 31086631.

13668013 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 can be written as a sum of positive squares in 2 ways, for example, as 1855044 + 11812969 = 1362^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 13668013 - 2⁵ = 13667981 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 (13668113) 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, 29098 + ... + 29563.

It is an arithmetic number, because the mean of its divisors is an integer number (3431727).

Almost surely, 2^13668013 is an apocalyptic number.

It is an amenable number.

13668013 is a deficient number, since it is larger than the sum of its proper divisors (58895).

13668013 is an equidigital number, since it uses as much as digits as its factorization.

13668013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58894.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13668013 is about 3697.0275898348. The cubic root of 13668013 is about 239.0938807084.

The spelling of 13668013 in words is "thirteen million, six hundred sixty-eight thousand, thirteen".