686913 has 8 divisors (see below), whose sum is σ = 919776. Its totient is φ = 456000.

The previous prime is 686911. The next prime is 686947. The reversal of 686913 is 319686.

686913 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 686913 - 2¹ = 686911 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686913.

It is not an unprimeable number, because it can be changed into a prime (686911) 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, 918 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (114972).

2⁶⁸⁶⁹¹³ is an apocalyptic number.

It is an amenable number.

686913 is a deficient number, since it is larger than the sum of its proper divisors (232863).

686913 is a wasteful number, since it uses less digits than its factorization.

686913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its digits is 7776, while the sum is 33.

The square root of 686913 is about 828.8021476806. The cubic root of 686913 is about 88.2335822674.

The spelling of 686913 in words is "six hundred eighty-six thousand, nine hundred thirteen".