9828891161 has 2 divisors, whose sum is σ = 9828891162. Its totient is φ = 9828891160.

The previous prime is 9828891157. The next prime is 9828891199. The reversal of 9828891161 is 1611988289.

It is a happy number.

9828891161 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., 9683544025 + 145347136 = 98405^2 + 12056^2 .

It is a cyclic number.

It is not a de Polignac number, because 9828891161 - 2² = 9828891157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9828891151) 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, 4914445580 + 4914445581.

It is an arithmetic number, because the mean of its divisors is an integer number (4914445581).

Almost surely, 2^9828891161 is an apocalyptic number.

It is an amenable number.

9828891161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9828891161 is an equidigital number, since it uses as much as digits as its factorization.

9828891161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 53.

The square root of 9828891161 is about 99140.7643757098. The cubic root of 9828891161 is about 2142.0758354208.

The spelling of 9828891161 in words is "nine billion, eight hundred twenty-eight million, eight hundred ninety-one thousand, one hundred sixty-one".