63995 has 4 divisors (see below), whose sum is σ = 76800. Its totient is φ = 51192.

The previous prime is 63977. The next prime is 63997. The reversal of 63995 is 59936.

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 63995 - 2¹⁰ = 62971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63997) 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, 6395 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (19200).

2⁶³⁹⁹⁵ is an apocalyptic number.

63995 is a deficient number, since it is larger than the sum of its proper divisors (12805).

63995 is a wasteful number, since it uses less digits than its factorization.

63995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12804.

The product of its digits is 7290, while the sum is 32.

The square root of 63995 is about 252.9723305028. The cubic root of 63995 is about 39.9989583062.

The spelling of 63995 in words is "sixty-three thousand, nine hundred ninety-five".