63963631 has 4 divisors (see below), whose sum is σ = 63994392. Its totient is φ = 63932872.

The previous prime is 63963623. The next prime is 63963689. The reversal of 63963631 is 13636936.

63963631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63963631 - 2³ = 63963623 is a prime.

It is a super-2 number, since 2×63963631² = 8182692181408322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63963131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12016 + ... + 16501.

It is an arithmetic number, because the mean of its divisors is an integer number (15998598).

Almost surely, 2^63963631 is an apocalyptic number.

63963631 is a deficient number, since it is larger than the sum of its proper divisors (30761).

63963631 is a wasteful number, since it uses less digits than its factorization.

63963631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30760.

The product of its digits is 52488, while the sum is 37.

The square root of 63963631 is about 7997.7266144824. The cubic root of 63963631 is about 399.9242168932.

The spelling of 63963631 in words is "sixty-three million, nine hundred sixty-three thousand, six hundred thirty-one".