13571609 has 2 divisors, whose sum is σ = 13571610. Its totient is φ = 13571608.

The previous prime is 13571603. The next prime is 13571629. The reversal of 13571609 is 90617531.

13571609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10259209 + 3312400 = 3203^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 13571609 - 2⁸ = 13571353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13571603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6785804 + 6785805.

It is an arithmetic number, because the mean of its divisors is an integer number (6785805).

Almost surely, 2^13571609 is an apocalyptic number.

It is an amenable number.

13571609 is a deficient number, since it is larger than the sum of its proper divisors (1).

13571609 is an equidigital number, since it uses as much as digits as its factorization.

13571609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 13571609 is about 3683.9664765033. The cubic root of 13571609 is about 238.5304237420.

The spelling of 13571609 in words is "thirteen million, five hundred seventy-one thousand, six hundred nine".