Ways to display numbers in assembly language

In the following code below I am not sure what the D'93' and D'122' mean. The only time I have used assembly in the past hexadecimal numbers or binary numbers have been used. What does this notation mean and how can I convert into something I can understand so I can check the math by hand?

#include <p18F452.inc>
SUM     EQU 0x10
        ORG 0x00
        GOTO START
        ORG 0x20
START:  MOVLW D'93'
        MOVWF SUM
        MOVLW D'122'
        ADDWF SUM,W
        BNC SAVE
        SETF WREG
SAVE:   MOVWF SUM
        SLEEP
        END

Solution

The D stands for decimal. By default unqualified numbers are interpreted as hexadecimal unless overridden by the RADIX or LIST directives.

Qualifiers/prefixes used by MPASM:

B'10' for binary
O'10' for octal
D'10' for decimal (can also be written as .10)
H'10' for hexadecimal (can also be written as 0x10)
A'a' for ASCII (can also be written as 'a')