1343 has 4 divisors (see below), whose sum is σ = 1440.
Its totient is φ = 1248.
The previous prime is 1327. The next prime is 1361. The reversal of 1343 is 3431.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3431 = 47 ⋅73.
It is a cyclic number.
It is not a de Polignac number, because 1343 - 24 = 1327 is a prime.
It is a lonely number, since its distance to closest prime (1327) sets a new record.
It is a Duffinian number.
It is a plaindrome in base 8 and base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1303) 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, 23 + ... + 56.
It is an arithmetic number, because the mean of its divisors is an integer number (360).
21343 is an apocalyptic number.
1343 is a deficient number, since it is larger than the sum of its proper divisors (97).
1343 is an equidigital number, since it uses as much as digits as its factorization.
1343 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 96.
The product of its digits is 36, while the sum is 11.
The square root of 1343 is about 36.6469644036.
The cubic root of 1343 is about 11.0329589985.
The spelling of 1343 in words is "one thousand, three hundred forty-three", and is thus an iban number.