1843 is nontrivially palindromic in base 13 and base 14.
1843 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3481 = 592.
It is a 6-Lehmer number, since φ(1843) divides (1843-1)6.
It is a cyclic number.
It is a Duffinian number.
1843 is an undulating number in base 13 and base 14.
It is a plaindrome in base 9.
It is a nialpdrome in base 16.
It is a zygodrome in base 2.
21843 is an apocalyptic number.
1843 is an equidigital number, since it uses as much as digits as its factorization.
1843 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 116.
The square root of 1843 is about 42.9301758673. The cubic root of 1843 is about 12.2605074361.
The spelling of 1843 in words is "one thousand, eight hundred forty-three".