This number is a prime.
The telephone area code for Oakland County, Michigan. Interestingly, the words "Telephone code Oakland" have, respectively, 9, 4, and 7 digits. [Hartley]
The largest 3-digit prime whose absolute value of the differences between any two of its digits are also prime. Note that 947 is the sum of first three consecutive primes in the sequence of primes with this property, i.e., 163+257+461. [Loungrides]
947²=896809 is the smallest circular-digit prime square containing all possible circular digits (0, 6, 8, 9). It also contains as substrings the Cyclops prime 809 and its "blinded" cousin 89. [Leonardis]