686361 has 8 divisors (see below), whose sum is σ = 985600. Its totient is φ = 422352.

The previous prime is 686359. The next prime is 686363. The reversal of 686361 is 163686.

686361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (686359) and next prime (686363).

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

It is not a de Polignac number, because 686361 - 2¹ = 686359 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686361.

It is not an unprimeable number, because it can be changed into a prime (686363) 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, 8761 + ... + 8838.

It is an arithmetic number, because the mean of its divisors is an integer number (123200).

2⁶⁸⁶³⁶¹ is an apocalyptic number.

It is an amenable number.

686361 is a deficient number, since it is larger than the sum of its proper divisors (299239).

686361 is a wasteful number, since it uses less digits than its factorization.

686361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17615.

The product of its digits is 5184, while the sum is 30.

The square root of 686361 is about 828.4690700322. The cubic root of 686361 is about 88.2099412389.

The spelling of 686361 in words is "six hundred eighty-six thousand, three hundred sixty-one".