686614 has 4 divisors (see below), whose sum is σ = 1029924. Its totient is φ = 343306.

The previous prime is 686611. The next prime is 686639. The reversal of 686614 is 416686.

686614 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (686611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171652 + ... + 171655.

It is an arithmetic number, because the mean of its divisors is an integer number (257481).

2⁶⁸⁶⁶¹⁴ is an apocalyptic number.

686614 is a deficient number, since it is larger than the sum of its proper divisors (343310).

686614 is a wasteful number, since it uses less digits than its factorization.

686614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343309.

The product of its digits is 6912, while the sum is 31.

The square root of 686614 is about 828.6217472406. The cubic root of 686614 is about 88.2207782831.

The spelling of 686614 in words is "six hundred eighty-six thousand, six hundred fourteen".