687386 has 16 divisors (see below), whose sum is σ = 1211136. Its totient is φ = 286416.

The previous prime is 687383. The next prime is 687389. The reversal of 687386 is 683786.

It is an interprime number because it is at equal distance from previous prime (687383) and next prime (687389).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687386.

It is not an unprimeable number, because it can be changed into a prime (687383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (75696).

2⁶⁸⁷³⁸⁶ is an apocalyptic number.

687386 is a deficient number, since it is larger than the sum of its proper divisors (523750).

687386 is a wasteful number, since it uses less digits than its factorization.

687386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373.

The product of its digits is 48384, while the sum is 38.

The square root of 687386 is about 829.0874501523. The cubic root of 687386 is about 88.2538298140.

Subtracting from 687386 its reverse (683786), we obtain a square (3600 = 60²).

The spelling of 687386 in words is "six hundred eighty-seven thousand, three hundred eighty-six".