13806643 has 2 divisors, whose sum is σ = 13806644. Its totient is φ = 13806642.

The previous prime is 13806607. The next prime is 13806671. The reversal of 13806643 is 34660831.

13806643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13806643 - 2⁹ = 13806131 is a prime.

It is not a weakly prime, because it can be changed into another prime (13806343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6903321 + 6903322.

It is an arithmetic number, because the mean of its divisors is an integer number (6903322).

Almost surely, 2^13806643 is an apocalyptic number.

13806643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13806643 is an equidigital number, since it uses as much as digits as its factorization.

13806643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13806643 is about 3715.7291343692. The cubic root of 13806643 is about 239.8995123300.

The spelling of 13806643 in words is "thirteen million, eight hundred six thousand, six hundred forty-three".