13680005 has 8 divisors (see below), whose sum is σ = 16461600. Its totient is φ = 10913616.

The previous prime is 13680001. The next prime is 13680011. The reversal of 13680005 is 50008631.

13680005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13680005 - 2² = 13680001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1715 + ... + 5504.

It is an arithmetic number, because the mean of its divisors is an integer number (2057700).

Almost surely, 2^13680005 is an apocalyptic number.

It is an amenable number.

13680005 is a deficient number, since it is larger than the sum of its proper divisors (2781595).

13680005 is an equidigital number, since it uses as much as digits as its factorization.

13680005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 13680005 is about 3698.6490777039. The cubic root of 13680005 is about 239.1637854240.

Adding to 13680005 its reverse (50008631), we get a palindrome (63688636).

The spelling of 13680005 in words is "thirteen million, six hundred eighty thousand, five".