687354 has 16 divisors (see below), whose sum is σ = 1388640. Its totient is φ = 226800.

The previous prime is 687343. The next prime is 687359. The reversal of 687354 is 453786.

It is a congruent number.

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

687354 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 129 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (86790).

2⁶⁸⁷³⁵⁴ is an apocalyptic number.

687354 is an abundant number, since it is smaller than the sum of its proper divisors (701286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687354 is a wasteful number, since it uses less digits than its factorization.

687354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its digits is 20160, while the sum is 33.

The square root of 687354 is about 829.0681516015. The cubic root of 687354 is about 88.2524602941.

The spelling of 687354 in words is "six hundred eighty-seven thousand, three hundred fifty-four".