1973 is nontrivially palindromic in base 15.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1973 is a prime.
It is a Sophie Germain prime.
1973 is an undulating number in base 15.
It is a Curzon number.
It is a congruent number.
It is a good prime.
It is an amenable number.
1973 is an equidigital number, since it uses as much as digits as its factorization.
1973 is an evil number, because the sum of its binary digits is even.
The square root of 1973 is about 44.4184646290. The cubic root of 1973 is about 12.5422569868.
Subtracting from 1973 its sum of digits (20), we obtain a triangular number (1953 = T62).
The spelling of 1973 in words is "one thousand, nine hundred seventy-three".