Related Clues:

• Like most primes
• Sort of peculiar
• "Hmm. . ."
• Somewhat strange
• 'Huh!'
• Like 123, but not 456
• Flaky
• Like a 'Ripley's Believe It or Not!' item
• Like this clue's number
• "Hmm ..."
• Not the usual thing
• Like 1, 3, 5, 7, etc.
• "How bizarre"
• One, three or five, e.g.
• Asymmetric