434

434 = 2 x 7 x 31.

434 is a palindrome that produces a composed prime: 4² + 3⁷ + 4³¹ = 4611686018427390107, a prime.

434 is the smallest composite number that satisfies the equation sigma(n + 2) = sigma(n) + 2, where sigma(n) is the sum of the divisors of n.

434 is 2002 in base 6.

434 Hungaria is an asteroid discovered in 1898.

Source: Prime Curios!