How to?
.h
@property (nonatomic, strong) NSNumber *seasonRoundN;
@property (nonatomic, strong) NSString *seasonRound;
.m
_weMeetAgain = [NSNumber numberWithInt:13];
_seasonRound = [NSString stringWithFormat:_weMeetAgain]; // incompatible :S
Should have looked at the reference better: (Answer below)
_weMeetAgain = [NSNumber numberWithInt:17];
_seasonRound = [NSString stringWithFormat:@"%@", _weMeetAgain];
Help :P, thank you.