1943 has 4 divisors (see below), whose sum is σ = 2040. Its totient is φ = 1848.

The previous prime is 1933. The next prime is 1949. The reversal of 1943 is 3491.

1943 is nontrivially palindromic in base 15 and base 16.

1943 is an esthetic number in base 15, 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.

It is a cyclic number.

It is not a de Polignac number, because 1943 - 2⁶ = 1879 is a prime.

It is a Duffinian number.

1943 is an undulating number in base 15 and base 16.

It is a plaindrome in base 6, base 9 and base 12.

It is a nialpdrome in base 7 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5 + ... + 62.

It is an arithmetic number, because the mean of its divisors is an integer number (510).

1943 is a deficient number, since it is larger than the sum of its proper divisors (97).

1943 is an equidigital number, since it uses as much as digits as its factorization.

1943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96.

The product of its digits is 108, while the sum is 17.

The square root of 1943 is about 44.0794736811. The cubic root of 1943 is about 12.4783625673.

The spelling of 1943 in words is "one thousand, nine hundred forty-three".