13541609 has 4 divisors (see below), whose sum is σ = 13549140. Its totient is φ = 13534080.

The previous prime is 13541569. The next prime is 13541611. The reversal of 13541609 is 90614531.

13541609 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1570009 + 11971600 = 1253^2 + 3460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13541609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13541669) 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, 689 + ... + 5249.

It is an arithmetic number, because the mean of its divisors is an integer number (3387285).

Almost surely, 2^13541609 is an apocalyptic number.

It is an amenable number.

13541609 is a deficient number, since it is larger than the sum of its proper divisors (7531).

13541609 is an equidigital number, since it uses as much as digits as its factorization.

13541609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13541609 is about 3679.8925256045. The cubic root of 13541609 is about 238.3545371564.

The spelling of 13541609 in words is "thirteen million, five hundred forty-one thousand, six hundred nine".