3943 has 2 divisors, whose sum is σ = 3944. Its totient is φ = 3942.

The previous prime is 3931. The next prime is 3947. The reversal of 3943 is 3493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3943 - 2⁵ = 3911 is a prime.

It is a d-powerful number, because it can be written as 3 + 4⁵ + 9³ + 3⁷ .

3943 is a lucky number.

It is a plaindrome in base 5, base 12 and base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 3943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971 + 1972.

It is an arithmetic number, because the mean of its divisors is an integer number (1972).

2³⁹⁴³ is an apocalyptic number.

3943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943 is an equidigital number, since it uses as much as digits as its factorization.

3943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 19.

The square root of 3943 is about 62.7933117458. The cubic root of 3943 is about 15.7982479497.

It can be divided in two parts, 3 and 943, that added together give a triangular number (946 = T₄₃).

The spelling of 3943 in words is "three thousand, nine hundred forty-three".