6463 has 4 divisors (see below), whose sum is σ = 6768. Its totient is φ = 6160.

The previous prime is 6451. The next prime is 6469. The reversal of 6463 is 3646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3646 = 2 ⋅1823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6463 is a prime.

It is a Duffinian number.

6463 is a lucky number.

It is a plaindrome in base 8.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 6463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118 + ... + 163.

It is an arithmetic number, because the mean of its divisors is an integer number (1692).

2⁶⁴⁶³ is an apocalyptic number.

6463 is a deficient number, since it is larger than the sum of its proper divisors (305).

6463 is a wasteful number, since it uses less digits than its factorization.

6463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its digits is 432, while the sum is 19.

The square root of 6463 is about 80.3927857460. The cubic root of 6463 is about 18.6270773774.

The spelling of 6463 in words is "six thousand, four hundred sixty-three".