11643

11643 is a natural number that follows 11642 and precedes 11644. It is a five-digit integer in base 10.

Mathematically, 11643 factors as 3 × 3881, where 3881 is prime. Therefore, 11643 is a semiprime and not a prime. It is odd and not a perfect square.

Digital properties: The sum of its decimal digits is 15, so its digital root is 6. It is congruent to 3 mod 4 because 11643 mod 4 equals 3. This implies that it cannot be expressed as a sum of two squares.

Representations: In binary, 11643 is 10110101111011. In hexadecimal, it is 0x2D7B. In octal, it is 26573.

As a semiprime, 11643 is of interest in elementary number theory as an example of a product of two primes. It illustrates properties such as having exactly two prime factors and specific modular constraints related to sums of squares.