686040713 has 2 divisors, whose sum is σ = 686040714. Its totient is φ = 686040712.

The previous prime is 686040703. The next prime is 686040737. The reversal of 686040713 is 317040686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 563207824 + 122832889 = 23732^2 + 11083^2 .

It is a cyclic number.

It is not a de Polignac number, because 686040713 - 2²⁸ = 417605257 is a prime.

It is not a weakly prime, because it can be changed into another prime (686040703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343020356 + 343020357.

It is an arithmetic number, because the mean of its divisors is an integer number (343020357).

Almost surely, 2^686040713 is an apocalyptic number.

It is an amenable number.

686040713 is a deficient number, since it is larger than the sum of its proper divisors (1).

686040713 is an equidigital number, since it uses as much as digits as its factorization.

686040713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 686040713 is about 26192.3789106679. The cubic root of 686040713 is about 881.9621819165.

The spelling of 686040713 in words is "six hundred eighty-six million, forty thousand, seven hundred thirteen".