687356 has 12 divisors (see below), whose sum is σ = 1209768. Its totient is φ = 341712.

The previous prime is 687343. The next prime is 687359. The reversal of 687356 is 653786.

It is a happy number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (100814).

2⁶⁸⁷³⁵⁶ is an apocalyptic number.

It is an amenable number.

687356 is a deficient number, since it is larger than the sum of its proper divisors (522412).

687356 is a wasteful number, since it uses less digits than its factorization.

687356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 986 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 687356 is about 829.0693577741. The cubic root of 687356 is about 88.2525458903.

The spelling of 687356 in words is "six hundred eighty-seven thousand, three hundred fifty-six".