13806513 has 24 divisors (see below), whose sum is σ = 23411648. Its totient is φ = 7674912.

The previous prime is 13806503. The next prime is 13806539. The reversal of 13806513 is 31560831.

13806513 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 651 + 3 = 666.

It is not a de Polignac number, because 13806513 - 2⁴ = 13806497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13806503) 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 23 ways as a sum of consecutive naturals, for example, 631 + ... + 5292.

Almost surely, 2^13806513 is an apocalyptic number.

It is an amenable number.

13806513 is a deficient number, since it is larger than the sum of its proper divisors (9605135).

13806513 is a wasteful number, since it uses less digits than its factorization.

13806513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973 (or 5970 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13806513 is about 3715.7116411261. The cubic root of 13806513 is about 239.8987593824.

The spelling of 13806513 in words is "thirteen million, eight hundred six thousand, five hundred thirteen".