13806805 has 16 divisors (see below), whose sum is σ = 17694720. Its totient is φ = 10305792.

The previous prime is 13806803. The next prime is 13806833. The reversal of 13806805 is 50860831.

It is a cyclic number.

It is not a de Polignac number, because 13806805 - 2¹ = 13806803 is a prime.

It is a super-3 number, since 3×13806805³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13806803) 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 15 ways as a sum of consecutive naturals, for example, 10156 + ... + 11434.

It is an arithmetic number, because the mean of its divisors is an integer number (1105920).

Almost surely, 2^13806805 is an apocalyptic number.

It is an amenable number.

13806805 is a deficient number, since it is larger than the sum of its proper divisors (3887915).

13806805 is a wasteful number, since it uses less digits than its factorization.

13806805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 13806805 is about 3715.7509335261. The cubic root of 13806805 is about 239.9004506119.

The spelling of 13806805 in words is "thirteen million, eight hundred six thousand, eight hundred five".