13663841 has 4 divisors (see below), whose sum is σ = 14033172. Its totient is φ = 13294512.

The previous prime is 13663829. The next prime is 13663849. The reversal of 13663841 is 14836631.

13663841 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 12453841 + 1210000 = 3529^2 + 1100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13663841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13663798 and 13663807.

It is not an unprimeable number, because it can be changed into a prime (13663849) 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, 184610 + ... + 184683.

It is an arithmetic number, because the mean of its divisors is an integer number (3508293).

Almost surely, 2^13663841 is an apocalyptic number.

It is an amenable number.

13663841 is a deficient number, since it is larger than the sum of its proper divisors (369331).

13663841 is an equidigital number, since it uses as much as digits as its factorization.

13663841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369330.

The product of its digits is 10368, while the sum is 32.

The square root of 13663841 is about 3696.4633097056. The cubic root of 13663841 is about 239.0695513690.

The spelling of 13663841 in words is "thirteen million, six hundred sixty-three thousand, eight hundred forty-one".