686050513 has 2 divisors, whose sum is σ = 686050514. Its totient is φ = 686050512.

The previous prime is 686050501. The next prime is 686050567. The reversal of 686050513 is 315050686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 576576144 + 109474369 = 24012^2 + 10463^2 .

It is a cyclic number.

It is not a de Polignac number, because 686050513 - 2⁵ = 686050481 is a prime.

It is not a weakly prime, because it can be changed into another prime (686050583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343025256 + 343025257.

It is an arithmetic number, because the mean of its divisors is an integer number (343025257).

Almost surely, 2^686050513 is an apocalyptic number.

It is an amenable number.

686050513 is a deficient number, since it is larger than the sum of its proper divisors (1).

686050513 is an equidigital number, since it uses as much as digits as its factorization.

686050513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 686050513 is about 26192.5659873179. The cubic root of 686050513 is about 881.9663814672.

The spelling of 686050513 in words is "six hundred eighty-six million, fifty thousand, five hundred thirteen".