13659809 has 8 divisors (see below), whose sum is σ = 14261760. Its totient is φ = 13068000.

The previous prime is 13659773. The next prime is 13659817. The reversal of 13659809 is 90895631.

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 13659809 - 2¹² = 13655713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13659839) 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 7 ways as a sum of consecutive naturals, for example, 284 + ... + 5234.

It is an arithmetic number, because the mean of its divisors is an integer number (1782720).

Almost surely, 2^13659809 is an apocalyptic number.

It is an amenable number.

13659809 is a deficient number, since it is larger than the sum of its proper divisors (601951).

13659809 is an equidigital number, since it uses as much as digits as its factorization.

13659809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 13659809 is about 3695.9178832869. The cubic root of 13659809 is about 239.0460337442.

The spelling of 13659809 in words is "thirteen million, six hundred fifty-nine thousand, eight hundred nine".