63686 has 8 divisors (see below), whose sum is σ = 109200. Its totient is φ = 27288.

The previous prime is 63671. The next prime is 63689. The reversal of 63686 is 68636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63689) by changing a digit.

63686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 2288.

It is an arithmetic number, because the mean of its divisors is an integer number (13650).

2⁶³⁶⁸⁶ is an apocalyptic number.

63686 is a deficient number, since it is larger than the sum of its proper divisors (45514).

63686 is a wasteful number, since it uses less digits than its factorization.

63686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558.

The product of its digits is 5184, while the sum is 29.

The square root of 63686 is about 252.3608527486. The cubic root of 63686 is about 39.9344760573.

Subtracting 63686 from its reverse (68636), we obtain a triangular number (4950 = T₉₉).

The spelling of 63686 in words is "sixty-three thousand, six hundred eighty-six".