63859 has 4 divisors (see below), whose sum is σ = 67240. Its totient is φ = 60480.

The previous prime is 63857. The next prime is 63863. The reversal of 63859 is 95836.

63859 = 21² + 22² + ... + 58².

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 63859 - 2¹ = 63857 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 63859.

It is not an unprimeable number, because it can be changed into a prime (63853) 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, 1662 + ... + 1699.

It is an arithmetic number, because the mean of its divisors is an integer number (16810).

2⁶³⁸⁵⁹ is an apocalyptic number.

63859 is a deficient number, since it is larger than the sum of its proper divisors (3381).

63859 is a wasteful number, since it uses less digits than its factorization.

63859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380.

The product of its digits is 6480, while the sum is 31.

The square root of 63859 is about 252.7033834360. The cubic root of 63859 is about 39.9706034013.

The spelling of 63859 in words is "sixty-three thousand, eight hundred fifty-nine".