9685665869 has 16 divisors (see below), whose sum is σ = 10640165184. Its totient is φ = 8743593600.

The previous prime is 9685665863. The next prime is 9685665887.

9685665869 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9685665869 is a prime.

It is a super-2 number, since 2×9685665869² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9685665799 and 9685665808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9685665863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3966689 + ... + 3969129.

It is an arithmetic number, because the mean of its divisors is an integer number (665010324).

Almost surely, 2^9685665869 is an apocalyptic number.

It is an amenable number.

9685665869 is a deficient number, since it is larger than the sum of its proper divisors (954499315).

9685665869 is a wasteful number, since it uses less digits than its factorization.

9685665869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828.

The product of its digits is 167961600, while the sum is 68.

The square root of 9685665869 is about 98415.7805892937. The cubic root of 9685665869 is about 2131.6202025346.

The spelling of 9685665869 in words is "nine billion, six hundred eighty-five million, six hundred sixty-five thousand, eight hundred sixty-nine".