687365 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 458880.

The previous prime is 687359. The next prime is 687383. The reversal of 687365 is 563786.

It is a happy number.

687365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687365 - 2⁸ = 687109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a plaindrome in base 9.

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 687365.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1196 + ... + 1674.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁸⁷³⁶⁵ is an apocalyptic number.

687365 is the 479-th octagonal number.

It is an amenable number.

687365 is a deficient number, since it is larger than the sum of its proper divisors (280315).

687365 is a wasteful number, since it uses less digits than its factorization.

687365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

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

The square root of 687365 is about 829.0747855290. The cubic root of 687365 is about 88.2529310713.

The spelling of 687365 in words is "six hundred eighty-seven thousand, three hundred sixty-five".