686602 has 8 divisors (see below), whose sum is σ = 1177056. Its totient is φ = 294252.

The previous prime is 686593. The next prime is 686611. The reversal of 686602 is 206686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (686593) and next prime (686611).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24508 + ... + 24535.

It is an arithmetic number, because the mean of its divisors is an integer number (147132).

2⁶⁸⁶⁶⁰² is an apocalyptic number.

686602 is a deficient number, since it is larger than the sum of its proper divisors (490454).

686602 is a wasteful number, since it uses less digits than its factorization.

686602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49052.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 686602 is about 828.6145062694. The cubic root of 686602 is about 88.2202643333.

It can be divided in two parts, 68 and 6602, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 686602 in words is "six hundred eighty-six thousand, six hundred two".