Related Clues:

• Far from conventional
• Unnerving
• Like all but one prime number
• Evoking goose bumps, say
• Like calm, sometimes
• Creeptastic
• Like most primes
• Sort of peculiar
• Amazingly coincidental
• Like many an omen
• "Hmm. . ."
• Apt to cause the willies
• Inducing goose bumps
• Surreal
• Weirder than weird