9689889829 has 2 divisors, whose sum is σ = 9689889830. Its totient is φ = 9689889828.

The previous prime is 9689889809. The next prime is 9689889893. The reversal of 9689889829 is 9289889869.

9689889829 is digitally balanced in base 2 and base 3, because in such bases 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., 7626004929 + 2063884900 = 87327^2 + 45430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9689889829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9689889809) 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, 4844944914 + 4844944915.

It is an arithmetic number, because the mean of its divisors is an integer number (4844944915).

Almost surely, 2^9689889829 is an apocalyptic number.

It is an amenable number.

9689889829 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689889829 is an equidigital number, since it uses as much as digits as its factorization.

9689889829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322486272, while the sum is 76.

The square root of 9689889829 is about 98437.2380199688. The cubic root of 9689889829 is about 2131.9300270400.

The spelling of 9689889829 in words is "nine billion, six hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred twenty-nine".