13800009 has 4 divisors (see below), whose sum is σ = 18400016. Its totient is φ = 9200004.

The previous prime is 13799939. The next prime is 13800013. The reversal of 13800009 is 90000831.

13800009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90000831 = 3 ⋅30000277.

It is not a de Polignac number, because 13800009 - 2¹⁵ = 13767241 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 (13800019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299999 + ... + 2300004.

It is an arithmetic number, because the mean of its divisors is an integer number (4600004).

Almost surely, 2^13800009 is an apocalyptic number.

It is an amenable number.

13800009 is a deficient number, since it is larger than the sum of its proper divisors (4600007).

13800009 is an equidigital number, since it uses as much as digits as its factorization.

13800009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600006.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13800009 is about 3714.8363355604. The cubic root of 13800009 is about 239.8610828017.

The spelling of 13800009 in words is "thirteen million, eight hundred thousand, nine".