400009

Properties

Appears in sequences

• a(n) is the least prime > a(n-1) whose digits do not appear in a(n-1).at n=35A030284
• Smallest prime in which the n-th significant digit is a 4.at n=4A069594
• Happy primes of the form a*10^k + b with single-digit a and b, a > 0, k > 0.at n=23A109902
• Naughty primes: primes in which the number of zeros is greater than the number of all other digits.at n=12A164968
• Smallest prime p such that p! ends with exactly 10^n trailing 0's (or 0, if no such p exists).at n=5A181582
• a(n) = 9 + 4 * 10^n.at n=4A350382
• Primes having only {0, 4, 9} as digits.at n=27A385768
• Prime numbersat n=33861