63918 has 24 divisors (see below), whose sum is σ = 143208. Its totient is φ = 20592.

The previous prime is 63913. The next prime is 63929. The reversal of 63918 is 81936.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63891 and 63900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 921 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (5967).

2⁶³⁹¹⁸ is an apocalyptic number.

63918 is an abundant number, since it is smaller than the sum of its proper divisors (79290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71604).

63918 is a wasteful number, since it uses less digits than its factorization.

63918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 125 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 63918 is about 252.8200941381. The cubic root of 63918 is about 39.9829093655.

The spelling of 63918 in words is "sixty-three thousand, nine hundred eighteen".