686099 has 2 divisors, whose sum is σ = 686100. Its totient is φ = 686098.

The previous prime is 686089. The next prime is 686117. The reversal of 686099 is 990686.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686099 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686099.

It is not a weakly prime, because it can be changed into another prime (686009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343049 + 343050.

It is an arithmetic number, because the mean of its divisors is an integer number (343050).

2⁶⁸⁶⁰⁹⁹ is an apocalyptic number.

686099 is a deficient number, since it is larger than the sum of its proper divisors (1).

686099 is an equidigital number, since it uses as much as digits as its factorization.

686099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 686099 is about 828.3109319573. The cubic root of 686099 is about 88.1987158799.

The spelling of 686099 in words is "six hundred eighty-six thousand, ninety-nine".