13806409 has 2 divisors, whose sum is σ = 13806410. Its totient is φ = 13806408.

The previous prime is 13806389. The next prime is 13806433. The reversal of 13806409 is 90460831.

13806409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 5184 = 3715^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 13806409 - 2⁷ = 13806281 is a prime.

It is a Chen prime.

It is equal to p₈₉₈₃₃₀ and since 13806409 and 898330 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13804409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6903204 + 6903205.

It is an arithmetic number, because the mean of its divisors is an integer number (6903205).

Almost surely, 2^13806409 is an apocalyptic number.

It is an amenable number.

13806409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13806409 is an equidigital number, since it uses as much as digits as its factorization.

13806409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13806409 is about 3715.6976464723. The cubic root of 13806409 is about 239.8981570210.

Subtracting from 13806409 its product of nonzero digits (5184), we obtain a square (13801225 = 3715²).

The spelling of 13806409 in words is "thirteen million, eight hundred six thousand, four hundred nine".