687086 has 4 divisors (see below), whose sum is σ = 1030632. Its totient is φ = 343542.

The previous prime is 687083. The next prime is 687101. The reversal of 687086 is 680786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680786 = 2 ⋅340393.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171770 + ... + 171773.

It is an arithmetic number, because the mean of its divisors is an integer number (257658).

2⁶⁸⁷⁰⁸⁶ is an apocalyptic number.

687086 is a deficient number, since it is larger than the sum of its proper divisors (343546).

687086 is a wasteful number, since it uses less digits than its factorization.

687086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343545.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 687086 is about 828.9065086003. The cubic root of 687086 is about 88.2409888961.

The spelling of 687086 in words is "six hundred eighty-seven thousand, eighty-six".