13656009 has 8 divisors (see below), whose sum is σ = 18506752. Its totient is φ = 8954640.

The previous prime is 13655989. The next prime is 13656011. The reversal of 13656009 is 90065631.

It is a happy number.

13656009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13656009 - 2⁷ = 13655881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13656029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37129 + ... + 37494.

It is an arithmetic number, because the mean of its divisors is an integer number (2313344).

Almost surely, 2^13656009 is an apocalyptic number.

It is an amenable number.

13656009 is a deficient number, since it is larger than the sum of its proper divisors (4850743).

13656009 is an equidigital number, since it uses as much as digits as its factorization.

13656009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74687.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 13656009 is about 3695.4037668433. The cubic root of 13656009 is about 239.0238650795.

The spelling of 13656009 in words is "thirteen million, six hundred fifty-six thousand, nine".