906

906 = 2 x 3 x 151.

906 is the number of perfect graphs with 7 vertices.

906 = 2⁵ x 3³ + 42.

906 is an even number that is not the sum of a pair of twin primes (A007534).

906 is a number n such that the concatenation 2n3n5n7n11n13 is a prime (A092117).

906 is a strobogrammatic cyclops number (A153806).

Source: What's Special About This Number?