686800843 has 2 divisors, whose sum is σ = 686800844. Its totient is φ = 686800842.

The previous prime is 686800817. The next prime is 686800943. The reversal of 686800843 is 348008686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686800843 - 2¹³ = 686792651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686800843.

It is not a weakly prime, because it can be changed into another prime (686800943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343400421 + 343400422.

It is an arithmetic number, because the mean of its divisors is an integer number (343400422).

Almost surely, 2^686800843 is an apocalyptic number.

686800843 is a deficient number, since it is larger than the sum of its proper divisors (1).

686800843 is an equidigital number, since it uses as much as digits as its factorization.

686800843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 686800843 is about 26206.8854120439. The cubic root of 686800843 is about 882.2877983854.

The spelling of 686800843 in words is "six hundred eighty-six million, eight hundred thousand, eight hundred forty-three".