8443 has 2 divisors, whose sum is σ = 8444. Its totient is φ = 8442.

The previous prime is 8431. The next prime is 8447. The reversal of 8443 is 3448.

8443 is nontrivially palindromic in base 9.

8443 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

8443 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 8443 - 2¹³ = 251 is a prime.

It is a d-powerful number, because it can be written as 8 + 4⁶ + 4⁶ + 3⁵ .

It is a plaindrome in base 15.

It is a nialpdrome in base 10 and base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 8443.

It is not a weakly prime, because it can be changed into another prime (8447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221 + 4222.

It is an arithmetic number, because the mean of its divisors is an integer number (4222).

2⁸⁴⁴³ is an apocalyptic number.

8443 is a deficient number, since it is larger than the sum of its proper divisors (1).

8443 is an equidigital number, since it uses as much as digits as its factorization.

8443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 8443 is about 91.8857986851. The cubic root of 8443 is about 20.3625546590.

The spelling of 8443 in words is "eight thousand, four hundred forty-three".