687927 has 4 divisors (see below), whose sum is σ = 917240. Its totient is φ = 458616.

The previous prime is 687923. The next prime is 687931. The reversal of 687927 is 729786.

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

It is an interprime number because it is at equal distance from previous prime (687923) and next prime (687931).

It is not a de Polignac number, because 687927 - 2² = 687923 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687923) 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, 114652 + ... + 114657.

It is an arithmetic number, because the mean of its divisors is an integer number (229310).

2⁶⁸⁷⁹²⁷ is an apocalyptic number.

687927 is a deficient number, since it is larger than the sum of its proper divisors (229313).

687927 is a wasteful number, since it uses less digits than its factorization.

687927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229312.

The product of its digits is 42336, while the sum is 39.

The square root of 687927 is about 829.4136483082. The cubic root of 687927 is about 88.2769768287.

The spelling of 687927 in words is "six hundred eighty-seven thousand, nine hundred twenty-seven".