9987000173 has 2 divisors, whose sum is σ = 9987000174. Its totient is φ = 9987000172.

The previous prime is 9987000167. The next prime is 9987000187. The reversal of 9987000173 is 3710007899.

9987000173 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., 6895973764 + 3091026409 = 83042^2 + 55597^2 .

It is a cyclic number.

It is not a de Polignac number, because 9987000173 - 2⁴ = 9987000157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987000103) 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, 4993500086 + 4993500087.

It is an arithmetic number, because the mean of its divisors is an integer number (4993500087).

Almost surely, 2^9987000173 is an apocalyptic number.

It is an amenable number.

9987000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987000173 is an equidigital number, since it uses as much as digits as its factorization.

9987000173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 9987000173 is about 99934.9797268204. The cubic root of 9987000173 is about 2153.5007092535.

The spelling of 9987000173 in words is "nine billion, nine hundred eighty-seven million, one hundred seventy-three", and thus it is an aban number.