9867844073 has 2 divisors, whose sum is σ = 9867844074. Its totient is φ = 9867844072.

The previous prime is 9867844067. The next prime is 9867844087. The reversal of 9867844073 is 3704487689.

9867844073 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., 5693004304 + 4174839769 = 75452^2 + 64613^2 .

It is a cyclic number.

It is not a de Polignac number, because 9867844073 - 2⁴ = 9867844057 is a prime.

It is not a weakly prime, because it can be changed into another prime (9867844013) 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, 4933922036 + 4933922037.

It is an arithmetic number, because the mean of its divisors is an integer number (4933922037).

Almost surely, 2^9867844073 is an apocalyptic number.

It is an amenable number.

9867844073 is a deficient number, since it is larger than the sum of its proper divisors (1).

9867844073 is an equidigital number, since it uses as much as digits as its factorization.

9867844073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The square root of 9867844073 is about 99337.0226703015. The cubic root of 9867844073 is about 2144.9018614348.

The spelling of 9867844073 in words is "nine billion, eight hundred sixty-seven million, eight hundred forty-four thousand, seventy-three".