987842161 has 2 divisors, whose sum is σ = 987842162. Its totient is φ = 987842160.

The previous prime is 987842147. The next prime is 987842183. The reversal of 987842161 is 161248789.

987842161 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., 692689761 + 295152400 = 26319^2 + 17180^2 .

It is a cyclic number.

It is not a de Polignac number, because 987842161 - 2¹⁷ = 987711089 is a prime.

It is not a weakly prime, because it can be changed into another prime (987843161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493921080 + 493921081.

It is an arithmetic number, because the mean of its divisors is an integer number (493921081).

Almost surely, 2^987842161 is an apocalyptic number.

It is an amenable number.

987842161 is a deficient number, since it is larger than the sum of its proper divisors (1).

987842161 is an equidigital number, since it uses as much as digits as its factorization.

987842161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 987842161 is about 31429.9564269504. The cubic root of 987842161 is about 995.9308514893.

The spelling of 987842161 in words is "nine hundred eighty-seven million, eight hundred forty-two thousand, one hundred sixty-one".