9685135861 has 2 divisors, whose sum is σ = 9685135862. Its totient is φ = 9685135860.

The previous prime is 9685135819. The next prime is 9685135879. The reversal of 9685135861 is 1685315869.

9685135861 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., 8249180625 + 1435955236 = 90825^2 + 37894^2 .

It is a cyclic number.

It is not a de Polignac number, because 9685135861 - 2²⁹ = 9148264949 is a prime.

It is a super-2 number, since 2×9685135861² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9685135799 and 9685135808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9685135891) 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, 4842567930 + 4842567931.

It is an arithmetic number, because the mean of its divisors is an integer number (4842567931).

Almost surely, 2^9685135861 is an apocalyptic number.

It is an amenable number.

9685135861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9685135861 is an equidigital number, since it uses as much as digits as its factorization.

9685135861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 52.

The square root of 9685135861 is about 98413.0878542077. The cubic root of 9685135861 is about 2131.5813204593.

The spelling of 9685135861 in words is "nine billion, six hundred eighty-five million, one hundred thirty-five thousand, eight hundred sixty-one".