1723 is a prime number.
1721 and 1723 form a twin prime pair.
1723 is a prime with distinct digits that is also a prime when the number is reversed (A046732).
1723 is the smallest of 101 consecutive primes whose sum is prime (A226380).
1723 is a central polygonal number (A002061).
1723 is the number of distinct lines through the origin in a three-dimensional cube of side length 12 (A090025).
1723 is 2324 in base 9.
1723 divides 413 - 1.
Source: On-Line Encyclopedia of Integer Sequences