63943 has 4 divisors (see below), whose sum is σ = 69768. Its totient is φ = 58120.

The previous prime is 63929. The next prime is 63949. The reversal of 63943 is 34936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63943 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63949) 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, 2896 + ... + 2917.

It is an arithmetic number, because the mean of its divisors is an integer number (17442).

2⁶³⁹⁴³ is an apocalyptic number.

63943 is a deficient number, since it is larger than the sum of its proper divisors (5825).

63943 is a wasteful number, since it uses less digits than its factorization.

63943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5824.

The product of its digits is 1944, while the sum is 25.

The square root of 63943 is about 252.8695315771. The cubic root of 63943 is about 39.9881214729.

The spelling of 63943 in words is "sixty-three thousand, nine hundred forty-three".