13568649 has 4 divisors (see below), whose sum is σ = 18091536. Its totient is φ = 9045764.

The previous prime is 13568627. The next prime is 13568707. The reversal of 13568649 is 94686531.

13568649 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13568649 - 2¹² = 13564553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13568649.

It is not an unprimeable number, because it can be changed into a prime (13568749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261439 + ... + 2261444.

It is an arithmetic number, because the mean of its divisors is an integer number (4522884).

Almost surely, 2^13568649 is an apocalyptic number.

It is an amenable number.

13568649 is a deficient number, since it is larger than the sum of its proper divisors (4522887).

13568649 is an equidigital number, since it uses as much as digits as its factorization.

13568649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522886.

The product of its digits is 155520, while the sum is 42.

The square root of 13568649 is about 3683.5647136979. The cubic root of 13568649 is about 238.5130811314.

The spelling of 13568649 in words is "thirteen million, five hundred sixty-eight thousand, six hundred forty-nine".