63955 has 4 divisors (see below), whose sum is σ = 76752. Its totient is φ = 51160.

The previous prime is 63949. The next prime is 63977. The reversal of 63955 is 55936.

It is a happy number.

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

It is not a de Polignac number, because 63955 - 2⁹ = 63443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6391 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (19188).

2⁶³⁹⁵⁵ is an apocalyptic number.

63955 is a deficient number, since it is larger than the sum of its proper divisors (12797).

63955 is a wasteful number, since it uses less digits than its factorization.

63955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12796.

The product of its digits is 4050, while the sum is 28.

The square root of 63955 is about 252.8932581150. The cubic root of 63955 is about 39.9906228019.

It can be divided in two parts, 6395 and 5, that added together give a square (6400 = 80²).

The spelling of 63955 in words is "sixty-three thousand, nine hundred fifty-five".