63911 has 4 divisors (see below), whose sum is σ = 64800. Its totient is φ = 63024.

The previous prime is 63907. The next prime is 63913. The reversal of 63911 is 11936.

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 63911 - 2² = 63907 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 326 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2⁶³⁹¹¹ is an apocalyptic number.

63911 is a deficient number, since it is larger than the sum of its proper divisors (889).

63911 is an equidigital number, since it uses as much as digits as its factorization.

63911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 162, while the sum is 20.

The square root of 63911 is about 252.8062499227. The cubic root of 63911 is about 39.9814497319.

The spelling of 63911 in words is "sixty-three thousand, nine hundred eleven".