687085 has 16 divisors (see below), whose sum is σ = 959616. Its totient is φ = 462528.

The previous prime is 687083. The next prime is 687101. The reversal of 687085 is 580786.

687085 = 23² + 24² + ... + 127².

It is a cyclic number.

It is not a de Polignac number, because 687085 - 2¹ = 687083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 687085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2⁶⁸⁷⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

687085 is a deficient number, since it is larger than the sum of its proper divisors (272531).

687085 is a wasteful number, since it uses less digits than its factorization.

687085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 687085 is about 828.9059053958. The cubic root of 687085 is about 88.2409460868.

The spelling of 687085 in words is "six hundred eighty-seven thousand, eighty-five".