686474837 has 2 divisors, whose sum is σ = 686474838. Its totient is φ = 686474836.

The previous prime is 686474797. The next prime is 686474843. The reversal of 686474837 is 738474686.

686474837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442302961 + 244171876 = 21031^2 + 15626^2 .

It is a cyclic number.

It is not a de Polignac number, because 686474837 - 2²⁴ = 669697621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686474857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343237418 + 343237419.

It is an arithmetic number, because the mean of its divisors is an integer number (343237419).

Almost surely, 2^686474837 is an apocalyptic number.

It is an amenable number.

686474837 is a deficient number, since it is larger than the sum of its proper divisors (1).

686474837 is an equidigital number, since it uses as much as digits as its factorization.

686474837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 53.

The square root of 686474837 is about 26200.6648198094. The cubic root of 686474837 is about 882.1481768143.

The spelling of 686474837 in words is "six hundred eighty-six million, four hundred seventy-four thousand, eight hundred thirty-seven".