65443 has 4 divisors (see below), whose sum is σ = 74800.
Its totient is φ = 56088.
The previous prime is 65437. The next prime is 65447. The reversal of 65443 is 34456.
Adding to 65443 its reverse (34456), we get a palindrome (99899).
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 65443 - 213 = 57251 is a prime.
It is a Duffinian number.
It is a plaindrome in base 15.
It is a nialpdrome in base 10 and base 16.
It is not an unprimeable number, because it can be changed into a prime (65447) 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, 4668 + ... + 4681.
It is an arithmetic number, because the mean of its divisors is an integer number (18700).
265443 is an apocalyptic number.
65443 is a deficient number, since it is larger than the sum of its proper divisors (9357).
65443 is an equidigital number, since it uses as much as digits as its factorization.
65443 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9356.
The product of its digits is 1440, while the sum is 22.
The square root of 65443 is about 255.8182948892.
The cubic root of 65443 is about 40.2983934979.
The spelling of 65443 in words is "sixty-five thousand, four hundred forty-three".