13649663 has 8 divisors (see below), whose sum is σ = 13946400. Its totient is φ = 13356288.

The previous prime is 13649651. The next prime is 13649677. The reversal of 13649663 is 36694631.

13649663 is digitally balanced in base 3, 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 13649663 - 2⁸ = 13649407 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 (13649063) 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, 8423 + ... + 9911.

It is an arithmetic number, because the mean of its divisors is an integer number (1743300).

Almost surely, 2^13649663 is an apocalyptic number.

13649663 is a deficient number, since it is larger than the sum of its proper divisors (296737).

13649663 is a wasteful number, since it uses less digits than its factorization.

13649663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its digits is 69984, while the sum is 38.

The square root of 13649663 is about 3694.5450328829. The cubic root of 13649663 is about 238.9868342391.

The spelling of 13649663 in words is "thirteen million, six hundred forty-nine thousand, six hundred sixty-three".