13608009 has 12 divisors (see below), whose sum is σ = 20690800. Its totient is φ = 8594424.

The previous prime is 13607981. The next prime is 13608013. The reversal of 13608009 is 90080631.

13608009 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13608009 - 2⁸ = 13607753 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 (13608029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39619 + ... + 39960.

Almost surely, 2^13608009 is an apocalyptic number.

13608009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13608009 is a deficient number, since it is larger than the sum of its proper divisors (7082791).

13608009 is a wasteful number, since it uses less digits than its factorization.

13608009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79604 (or 79601 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13608009 is about 3688.9034956203. The cubic root of 13608009 is about 238.7434851068.

The spelling of 13608009 in words is "thirteen million, six hundred eight thousand, nine".