13443 has 4 divisors (see below), whose sum is σ = 17928. Its totient is φ = 8960.

The previous prime is 13441. The next prime is 13451. The reversal of 13443 is 34431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13443 - 2¹ = 13441 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁸ + 4³ + 4⁴ + 3⁸ .

It is a D-number.

13443 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (13441) 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, 2238 + ... + 2243.

It is an arithmetic number, because the mean of its divisors is an integer number (4482).

2¹³⁴⁴³ is an apocalyptic number.

13443 is a deficient number, since it is larger than the sum of its proper divisors (4485).

13443 is an equidigital number, since it uses as much as digits as its factorization.

13443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484.

The product of its digits is 144, while the sum is 15.

The square root of 13443 is about 115.9439519768. The cubic root of 13443 is about 23.7774567038. Note that the first 3 decimals are identical.

Adding to 13443 its reverse (34431), we get a palindrome (47874).

The spelling of 13443 in words is "thirteen thousand, four hundred forty-three".