13805643 has 8 divisors (see below), whose sum is σ = 18856656. Its totient is φ = 8979200.

The previous prime is 13805641. The next prime is 13805651. The reversal of 13805643 is 34650831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13805643 - 2¹ = 13805641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13805643.

It is not an unprimeable number, because it can be changed into a prime (13805641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55998 + ... + 56243.

It is an arithmetic number, because the mean of its divisors is an integer number (2357082).

Almost surely, 2^13805643 is an apocalyptic number.

13805643 is a deficient number, since it is larger than the sum of its proper divisors (5051013).

13805643 is a wasteful number, since it uses less digits than its factorization.

13805643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112285.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13805643 is about 3715.5945688409. The cubic root of 13805643 is about 239.8937203040.

The spelling of 13805643 in words is "thirteen million, eight hundred five thousand, six hundred forty-three".