1893 is an esthetic number in base 3 and base 16, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 3981 = 3 ⋅1327.
It is a D-number.
It is the 44-th Hogben number.
It is a Duffinian number.
1893 is a lucky number.
It is a plaindrome in base 12.
It is a nialpdrome in base 14, base 15 and base 16.
It is a congruent number.
21893 is an apocalyptic number.
It is an amenable number.
1893 is an equidigital number, since it uses as much as digits as its factorization.
1893 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 634.
The square root of 1893 is about 43.5086198356. The cubic root of 1893 is about 12.3703941639.
The spelling of 1893 in words is "one thousand, eight hundred ninety-three".