This is the 179th most frequent Danish word.
rigtig
Correct; right; real; truly.
'Rigtig' means 'really' here, used to emphasize the adjective 'good', enhancing the positive description of the friend.
Hun er en rigtig god ven.
She is a really good friend.
'Rigtig' in this sentence means 'correct' or 'true', questioning the accuracy of the statement made by 'han'.
Er det rigtig, hvad han sagde?
Is it correct, what he said?
'Rigtig' is used adverbially here to signify 'really', expressing a degree of truth about not having time, implying a limitation rather than a complete absence of time.