686125873 has 2 divisors, whose sum is σ = 686125874. Its totient is φ = 686125872.

The previous prime is 686125861. The next prime is 686125889. The reversal of 686125873 is 378521686.

686125873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591802929 + 94322944 = 24327^2 + 9712^2 .

It is a cyclic number.

It is not a de Polignac number, because 686125873 - 2⁵ = 686125841 is a prime.

It is not a weakly prime, because it can be changed into another prime (686125073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343062936 + 343062937.

It is an arithmetic number, because the mean of its divisors is an integer number (343062937).

Almost surely, 2^686125873 is an apocalyptic number.

It is an amenable number.

686125873 is a deficient number, since it is larger than the sum of its proper divisors (1).

686125873 is an equidigital number, since it uses as much as digits as its factorization.

686125873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 686125873 is about 26194.0045239364. The cubic root of 686125873 is about 881.9986738188.

The spelling of 686125873 in words is "six hundred eighty-six million, one hundred twenty-five thousand, eight hundred seventy-three".