686243 has 4 divisors (see below), whose sum is σ = 691320. Its totient is φ = 681168.

The previous prime is 686209. The next prime is 686267. The reversal of 686243 is 342686.

686243 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.

It is a cyclic number.

It is not a de Polignac number, because 686243 - 2⁸ = 685987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686293) 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, 2330 + ... + 2607.

It is an arithmetic number, because the mean of its divisors is an integer number (172830).

2⁶⁸⁶²⁴³ is an apocalyptic number.

686243 is a deficient number, since it is larger than the sum of its proper divisors (5077).

686243 is a wasteful number, since it uses less digits than its factorization.

686243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076.

The product of its digits is 6912, while the sum is 29.

The square root of 686243 is about 828.3978512768. The cubic root of 686243 is about 88.2048858965.

It can be divided in two parts, 686 and 243, that added together give a palindrome (929).

The spelling of 686243 in words is "six hundred eighty-six thousand, two hundred forty-three".