686087 has 2 divisors, whose sum is σ = 686088. Its totient is φ = 686086.

The previous prime is 686057. The next prime is 686089. The reversal of 686087 is 780686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686087 - 2¹⁰ = 685063 is a prime.

Together with 686089, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343043 + 343044.

It is an arithmetic number, because the mean of its divisors is an integer number (343044).

2⁶⁸⁶⁰⁸⁷ is an apocalyptic number.

686087 is a deficient number, since it is larger than the sum of its proper divisors (1).

686087 is an equidigital number, since it uses as much as digits as its factorization.

686087 is an odious number, because the sum of its binary digits is odd.

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

The square root of 686087 is about 828.3036882690. The cubic root of 686087 is about 88.1982016728.

The spelling of 686087 in words is "six hundred eighty-six thousand, eighty-seven".