13443609 has 8 divisors (see below), whose sum is σ = 18263232. Its totient is φ = 8793200.

The previous prime is 13443589. The next prime is 13443623. The reversal of 13443609 is 90634431.

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 13443609 - 2⁹ = 13443097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13443629) 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, 42117 + ... + 42434.

It is an arithmetic number, because the mean of its divisors is an integer number (2282904).

Almost surely, 2^13443609 is an apocalyptic number.

It is an amenable number.

13443609 is a deficient number, since it is larger than the sum of its proper divisors (4819623).

13443609 is an equidigital number, since it uses as much as digits as its factorization.

13443609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84607.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 13443609 is about 3666.5527406544. The cubic root of 13443609 is about 237.7781575694.

The spelling of 13443609 in words is "thirteen million, four hundred forty-three thousand, six hundred nine".