6561000

Appears in sequences

• Numbers of form 9^i*10^j, with i, j >= 0.at n=31A025635
• Totally multiplicative sequence with a(p) = 9*(p+3) for prime p.at n=39A167328
• 3-full numbers (A036966) sandwiched between twin primes.at n=8A360840
• Numbers m of the form 2^i * 3^j * 5^k such that i, j, k > 0 and m+1 and m-1 are both prime numbers.at n=25A386252