686297 has 8 divisors (see below), whose sum is σ = 730944. Its totient is φ = 642928.

The previous prime is 686293. The next prime is 686317. The reversal of 686297 is 792686.

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 686297 - 2² = 686293 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 686297.

It is not an unprimeable number, because it can be changed into a prime (686293) 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 7 ways as a sum of consecutive naturals, for example, 938 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (91368).

2⁶⁸⁶²⁹⁷ is an apocalyptic number.

It is an amenable number.

686297 is a deficient number, since it is larger than the sum of its proper divisors (44647).

686297 is a wasteful number, since it uses less digits than its factorization.

686297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its digits is 36288, while the sum is 38.

The square root of 686297 is about 828.4304436704. The cubic root of 686297 is about 88.2071994301.

The spelling of 686297 in words is "six hundred eighty-six thousand, two hundred ninety-seven".