It is a happy number.
1333 is nontrivially palindromic in base 6, base 13 and base 16.
1333 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is the 37-th Hogben number.
It is a Duffinian number.
1333 is an undulating number in base 6, base 13 and base 16.
It is a plaindrome in base 10 and base 15.
It is a nialpdrome in base 12.
It is a congruent number.
It is a 18-hyperperfect number.
21333 is an apocalyptic number.
It is an amenable number.
1333 is an equidigital number, since it uses as much as digits as its factorization.
1333 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 74.
The square root of 1333 is about 36.5102725271. The cubic root of 1333 is about 11.0055068845.
Adding to 1333 its reverse (3331), we get a palindrome (4664).
The spelling of 1333 in words is "one thousand, three hundred thirty-three".