686229 has 8 divisors (see below), whose sum is σ = 930720. Its totient is φ = 449616.

The previous prime is 686209. The next prime is 686267. The reversal of 686229 is 922686.

686229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 686229 - 2⁵ = 686197 is a prime.

686229 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 686229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686209) 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, 1762 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (116340).

2⁶⁸⁶²²⁹ is an apocalyptic number.

It is an amenable number.

686229 is a deficient number, since it is larger than the sum of its proper divisors (244491).

686229 is a wasteful number, since it uses less digits than its factorization.

686229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939.

The product of its digits is 10368, while the sum is 33.

The square root of 686229 is about 828.3894011876. The cubic root of 686229 is about 88.2042860716.

The spelling of 686229 in words is "six hundred eighty-six thousand, two hundred twenty-nine".