686065 has 8 divisors (see below), whose sum is σ = 842688. Its totient is φ = 535920.

The previous prime is 686057. The next prime is 686087. The reversal of 686065 is 560686.

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

It is not a de Polignac number, because 686065 - 2³ = 686057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 1810.

It is an arithmetic number, because the mean of its divisors is an integer number (105336).

2⁶⁸⁶⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

686065 is a deficient number, since it is larger than the sum of its proper divisors (156623).

686065 is a wasteful number, since it uses less digits than its factorization.

686065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 686065 is about 828.2904080092. The cubic root of 686065 is about 88.1972589444.

The spelling of 686065 in words is "six hundred eighty-six thousand, sixty-five".