8685868613 has 2 divisors, whose sum is σ = 8685868614. Its totient is φ = 8685868612.

The previous prime is 8685868591. The next prime is 8685868663. The reversal of 8685868613 is 3168685868.

8685868613 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., 8472650209 + 213218404 = 92047^2 + 14602^2 .

It is a cyclic number.

It is not a de Polignac number, because 8685868613 - 2¹⁴ = 8685852229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8685868663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4342934306 + 4342934307.

It is an arithmetic number, because the mean of its divisors is an integer number (4342934307).

Almost surely, 2^8685868613 is an apocalyptic number.

It is an amenable number.

8685868613 is a deficient number, since it is larger than the sum of its proper divisors (1).

8685868613 is an equidigital number, since it uses as much as digits as its factorization.

8685868613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13271040, while the sum is 59.

The square root of 8685868613 is about 93198.0075591748. The cubic root of 8685868613 is about 2055.5959431371.

The spelling of 8685868613 in words is "eight billion, six hundred eighty-five million, eight hundred sixty-eight thousand, six hundred thirteen".