686357 has 8 divisors (see below), whose sum is σ = 796032. Its totient is φ = 579600.

The previous prime is 686353. The next prime is 686359. The reversal of 686357 is 753686.

It is a happy number.

686357 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 686357 - 2² = 686353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686353) 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, 194 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (99504).

2⁶⁸⁶³⁵⁷ is an apocalyptic number.

It is an amenable number.

686357 is a deficient number, since it is larger than the sum of its proper divisors (109675).

686357 is a wasteful number, since it uses less digits than its factorization.

686357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

The product of its digits is 30240, while the sum is 35.

The square root of 686357 is about 828.4666559373. The cubic root of 686357 is about 88.2097698808.

The spelling of 686357 in words is "six hundred eighty-six thousand, three hundred fifty-seven".