67231

Properties

Appears in sequences

• n times n+8 gives the concatenation of two numbers m and m+4.at n=3A116320
• Number of powerful numbers <= 10^n.at n=9A118896
• Numbers k such that k-1 and k+1 are each the product of exactly 7 primes, counted with multiplicity.at n=17A157487
• Primes of the form 7n^2 + 3.at n=7A201604
• Primes of the form 10n^2 - 9.at n=29A201964
• Primes whose base-9 representation also is the base-3 representation of a prime.at n=34A235472
• Partial sums of A255743.at n=36A255764
• Primes p with p-1, p+1, prime(p)-1 and prime(p)+1 all practical.at n=11A257924
• Smallest prime number such that the number of distinct prime factors with multiplicity of its 9's complement is equal to n. If no such number exists, return -1.at n=14A378139
• Prime numbersat n=6700