9887663161 has 2 divisors, whose sum is σ = 9887663162. Its totient is φ = 9887663160.

The previous prime is 9887663111. The next prime is 9887663167. The reversal of 9887663161 is 1613667889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6898963600 + 2988699561 = 83060^2 + 54669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9887663161 is a prime.

It is not a weakly prime, because it can be changed into another prime (9887663167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943831580 + 4943831581.

It is an arithmetic number, because the mean of its divisors is an integer number (4943831581).

Almost surely, 2^9887663161 is an apocalyptic number.

It is an amenable number.

9887663161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887663161 is an equidigital number, since it uses as much as digits as its factorization.

9887663161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 9887663161 is about 99436.7294363607. The cubic root of 9887663161 is about 2146.3368783910.

The spelling of 9887663161 in words is "nine billion, eight hundred eighty-seven million, six hundred sixty-three thousand, one hundred sixty-one".