687607 has 4 divisors (see below), whose sum is σ = 690336. Its totient is φ = 684880.

The previous prime is 687593. The next prime is 687623. The reversal of 687607 is 706786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 687607 - 2¹⁵ = 654839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943 + ... + 1504.

It is an arithmetic number, because the mean of its divisors is an integer number (172584).

2⁶⁸⁷⁶⁰⁷ is an apocalyptic number.

687607 is a deficient number, since it is larger than the sum of its proper divisors (2729).

687607 is a wasteful number, since it uses less digits than its factorization.

687607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 687607 is about 829.2207185062. The cubic root of 687607 is about 88.2632869004.

The spelling of 687607 in words is "six hundred eighty-seven thousand, six hundred seven".