Store a string prefix before number in COBOL

I need to store Nº before a number (integer), like Nº423.

I try:

• 77 SC PIC 'Nº'9 VALUE 423.
• 77 SC PIC N9 VALUE 423.

But I don't achieve it. What can I try next?

    01  prefixed-number.
        05  the-prefix pic xx   value 'Nº'.
        05  the-number pic 999  value 423.

I suggest you familiarize yourself with your compiler's documentation on data definitions in COBOL, including the PICTURE clause and the USAGE clause.