687387 has 8 divisors (see below), whose sum is σ = 948240. Its totient is φ = 442400.

The previous prime is 687383. The next prime is 687389. The reversal of 687387 is 783786.

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

It is a cyclic number.

It is not a de Polignac number, because 687387 - 2² = 687383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687383) 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, 3864 + ... + 4037.

It is an arithmetic number, because the mean of its divisors is an integer number (118530).

2⁶⁸⁷³⁸⁷ is an apocalyptic number.

687387 is a deficient number, since it is larger than the sum of its proper divisors (260853).

687387 is a wasteful number, since it uses less digits than its factorization.

687387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933.

The product of its digits is 56448, while the sum is 39.

The square root of 687387 is about 829.0880532247. The cubic root of 687387 is about 88.2538726108.

The spelling of 687387 in words is "six hundred eighty-seven thousand, three hundred eighty-seven".