9987000161 has 2 divisors, whose sum is σ = 9987000162. Its totient is φ = 9987000160.

The previous prime is 9987000157. The next prime is 9987000167. The reversal of 9987000161 is 1610007899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9911397136 + 75603025 = 99556^2 + 8695^2 .

It is a cyclic number.

It is not a de Polignac number, because 9987000161 - 2² = 9987000157 is a prime.

It is not a weakly prime, because it can be changed into another prime (9987000167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993500080 + 4993500081.

It is an arithmetic number, because the mean of its divisors is an integer number (4993500081).

Almost surely, 2^9987000161 is an apocalyptic number.

It is an amenable number.

9987000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987000161 is an equidigital number, since it uses as much as digits as its factorization.

9987000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 9987000161 is about 99934.9796667813. The cubic root of 9987000161 is about 2153.5007083910.

The spelling of 9987000161 in words is "nine billion, nine hundred eighty-seven million, one hundred sixty-one", and thus it is an aban number.