Static and dynamic parameter issue

Dear experts,

As we know that db_block_size is a static parameter whereas db_cache_size is a dynamic parameter.  so, is there any way through which we can change the static parameter to dynamic and dynamic parameter to static.  

SQL> select name, ISSYS_MODIFIABLE from v$parameter where name='db_block_size';

NAME

--------------------------------------------------------------------------------

ISSYS_MOD

---------

db_block_size

FALSE

SQL> select name, ISSYS_MODIFIABLE from v$parameter where name='db_cache_size';

NAME

--------------------------------------------------------------------------------

ISSYS_MOD

---------

db_cache_size

IMMEDIATE

Regards,

Raman