9886561 has 2 divisors, whose sum is σ = 9886562. Its totient is φ = 9886560.

The previous prime is 9886559. The next prime is 9886589. The reversal of 9886561 is 1656889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 553536 = 3055^2 + 744^2 .

It is a cyclic number.

It is not a de Polignac number, because 9886561 - 2¹ = 9886559 is a prime.

Together with 9886559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9881561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943280 + 4943281.

It is an arithmetic number, because the mean of its divisors is an integer number (4943281).

Almost surely, 2^9886561 is an apocalyptic number.

It is an amenable number.

9886561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9886561 is an equidigital number, since it uses as much as digits as its factorization.

9886561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 43.

The square root of 9886561 is about 3144.2902219738. The cubic root of 9886561 is about 214.6257125920.

The spelling of 9886561 in words is "nine million, eight hundred eighty-six thousand, five hundred sixty-one".