191 (the 43rd prime)

 
Next prime193
Previous prime181
Octal(277)8
Hexadecimal(BF)16
Prime gap2
14th Twin prime (the small number)The big number is 193 .
13th Prime triplet (the smallest number)The others are 193 and 197 .
4th Prime quadruplet (the smallest number)The others are 193 , 197 and 199 .
25th Sexy prime (the small number)The big number is 197 .
23rd Prime of the Form 4n+3 
15th Sophie Germain prime