686055 has 8 divisors (see below), whose sum is σ = 1097712. Its totient is φ = 365888.

The previous prime is 686051. The next prime is 686057. The reversal of 686055 is 550686.

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

It is a cyclic number.

It is not a de Polignac number, because 686055 - 2² = 686051 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686055.

It is not an unprimeable number, because it can be changed into a prime (686051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22854 + ... + 22883.

It is an arithmetic number, because the mean of its divisors is an integer number (137214).

2⁶⁸⁶⁰⁵⁵ is an apocalyptic number.

686055 is a deficient number, since it is larger than the sum of its proper divisors (411657).

686055 is a wasteful number, since it uses less digits than its factorization.

686055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45745.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 686055 is about 828.2843714570. The cubic root of 686055 is about 88.1968304248.

The spelling of 686055 in words is "six hundred eighty-six thousand, fifty-five".