685587 has 8 divisors (see below), whose sum is σ = 1044736. Its totient is φ = 391752.

The previous prime is 685547. The next prime is 685591. The reversal of 685587 is 785586.

It is a happy number.

685587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 685587 - 2⁷ = 685459 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685587.

It is not an unprimeable number, because it can be changed into a prime (685537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16303 + ... + 16344.

It is an arithmetic number, because the mean of its divisors is an integer number (130592).

2⁶⁸⁵⁵⁸⁷ is an apocalyptic number.

685587 is a deficient number, since it is larger than the sum of its proper divisors (359149).

685587 is a wasteful number, since it uses less digits than its factorization.

685587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32657.

The product of its digits is 67200, while the sum is 39.

The square root of 685587 is about 828.0018115922. The cubic root of 685587 is about 88.1767710487.

Subtracting 685587 from its reverse (785586), we obtain a palindrome (99999).

The spelling of 685587 in words is "six hundred eighty-five thousand, five hundred eighty-seven".