40009

Properties

Appears in sequences

• Primes having only 0,4,6,8,9 as digits.at n=34A061372
• Smallest prime in which the n-th significant digit is a 4.at n=3A069594
• Happy primes of the form a*10^k + b with single-digit a and b, a > 0, k > 0.at n=17A109902
• Prime numbers obtained by inserting a 0 between each pair of adjacent digits of a prime number > 10.at n=33A119680
• Primes of the form k^2 + 9.at n=24A138353
• Naughty primes: primes in which the number of zeros is greater than the number of all other digits.at n=2A164968
• Q-residue of the Lucas triangle A114525, where Q is the triangle given by t(i,j)=1 for 0<=i<=j. (See Comments.)at n=12A193662
• a(1)=2; a(n)=smallest prime greater than the half-sum of all previous terms.at n=25A196375
• Primes of the form 5k^3+9.at n=2A201178
• Prime numbers such that, in base 10, all their proper prefixes and suffixes represent composites.at n=27A254754
• Primes that yield squares after deletion of their zero digits.at n=16A321151
• a(n) = 9 + 4 * 10^n.at n=3A350382
• Primes having only {0, 4, 9} as digits.at n=10A385768
• Primes having only {0, 2, 4, 9} as digits.at n=34A386048
• Primes having only {0, 4, 5, 9} as digits.at n=20A386071
• Primes having only {0, 4, 6, 9} as digits.at n=16A386073
• Primes having only {0, 4, 7, 9} as digits.at n=35A386075
• Primes having only {0, 4, 8, 9} as digits.at n=17A386076
• Primes containing 000 as a substring.at n=2A386247
• Prime numbersat n=4204