686268974117 has 2 divisors, whose sum is σ = 686268974118. Its totient is φ = 686268974116.

The previous prime is 686268974047. The next prime is 686268974137. The reversal of 686268974117 is 711479862686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352039302241 + 334229671876 = 593329^2 + 578126^2 .

It is a cyclic number.

It is not a de Polignac number, because 686268974117 - 2²⁶ = 686201865253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686268974137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343134487058 + 343134487059.

It is an arithmetic number, because the mean of its divisors is an integer number (343134487059).

Almost surely, 2^686268974117 is an apocalyptic number.

It is an amenable number.

686268974117 is a deficient number, since it is larger than the sum of its proper divisors (1).

686268974117 is an equidigital number, since it uses as much as digits as its factorization.

686268974117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 65.

The spelling of 686268974117 in words is "six hundred eighty-six billion, two hundred sixty-eight million, nine hundred seventy-four thousand, one hundred seventeen".