172171

Properties

Appears in sequences

• Primes whose decimal expansion is a concatenation of two or more consecutive decreasing numbers (no leading zeros allowed).at n=21A052088
• Primes formed by concatenating k with k-1.at n=19A052089
• Emirps (A006567) whose difference with the reversal is a perfect square.at n=25A217386
• Prime numbersat n=15681