687315 has 8 divisors (see below), whose sum is σ = 1099728. Its totient is φ = 366560.

The previous prime is 687311. The next prime is 687317. The reversal of 687315 is 513786.

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

It is not a de Polignac number, because 687315 - 2² = 687311 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687315.

It is not an unprimeable number, because it can be changed into a prime (687311) 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, 22896 + ... + 22925.

It is an arithmetic number, because the mean of its divisors is an integer number (137466).

2⁶⁸⁷³¹⁵ is an apocalyptic number.

687315 is a deficient number, since it is larger than the sum of its proper divisors (412413).

687315 is a wasteful number, since it uses less digits than its factorization.

687315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45829.

The product of its digits is 5040, while the sum is 30.

The square root of 687315 is about 829.0446308855. The cubic root of 687315 is about 88.2507911343.

The spelling of 687315 in words is "six hundred eighty-seven thousand, three hundred fifteen".