463 is a prime number.
461 and 463 form a twin prime pair.
463 is a centered heptagonal number.
463 is the smallest multidigit prime such that both the sum of the digits and the product of the digits of its square remain square.
463 divided by 595 is an excellent approximation to the common logarithm of 6.
463 is 111001111 in base 2 (binary).
463 is a divisor of 213 - 1.
463 meters is exactly one-fourth of an international nautical mile.
Source: Prime Curios!