686347 has 4 divisors (see below), whose sum is σ = 698040. Its totient is φ = 674656.

The previous prime is 686339. The next prime is 686353. The reversal of 686347 is 743686.

686347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743686 = 2 ⋅371843.

It is a cyclic number.

It is not a de Polignac number, because 686347 - 2³ = 686339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5758 + ... + 5875.

It is an arithmetic number, because the mean of its divisors is an integer number (174510).

2⁶⁸⁶³⁴⁷ is an apocalyptic number.

686347 is a deficient number, since it is larger than the sum of its proper divisors (11693).

686347 is a wasteful number, since it uses less digits than its factorization.

686347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11692.

The product of its digits is 24192, while the sum is 34.

The square root of 686347 is about 828.4606206694. The cubic root of 686347 is about 88.2093414828.

The spelling of 686347 in words is "six hundred eighty-six thousand, three hundred forty-seven".