7443 has 6 divisors (see below), whose sum is σ = 10764. Its totient is φ = 4956.

The previous prime is 7433. The next prime is 7451. The reversal of 7443 is 3447.

It is not a de Polignac number, because 7443 - 2⁵ = 7411 is a prime.

7443 is a lucky number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (7433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (1794).

2⁷⁴⁴³ is an apocalyptic number.

7443 is a deficient number, since it is larger than the sum of its proper divisors (3321).

7443 is a wasteful number, since it uses less digits than its factorization.

7443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 830 counting only the distinct ones).

The product of its digits is 336, while the sum is 18.

The square root of 7443 is about 86.2728230673. The cubic root of 7443 is about 19.5246237255.

It can be divided in two parts, 744 and 3, that added together give a palindrome (747).

The spelling of 7443 in words is "seven thousand, four hundred forty-three", and thus it is an iban number.