81343 has 2 divisors, whose sum is σ = 81344.
Its totient is φ = 81342.
The previous prime is 81331. The next prime is 81349. The reversal of 81343 is 34318.
It can be divided in two parts, 81 and 343, that added together give a palindrome (424).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 81343 - 29 = 80831 is a prime.
It is a plaindrome in base 8.
It is a self number, because there is not a number n which added to its sum of digits gives 81343.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (81349) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40671 + 40672.
It is an arithmetic number, because the mean of its divisors is an integer number (40672).
281343 is an apocalyptic number.
81343 is a deficient number, since it is larger than the sum of its proper divisors (1).
81343 is an equidigital number, since it uses as much as digits as its factorization.
81343 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 288, while the sum is 19.
The square root of 81343 is about 285.2069424120.
The cubic root of 81343 is about 43.3284741428.
The spelling of 81343 in words is "eighty-one thousand, three hundred forty-three".