9889561 has 4 divisors (see below), whose sum is σ = 10788624. Its totient is φ = 8990500.

The previous prime is 9889559. The next prime is 9889601. The reversal of 9889561 is 1659889.

9889561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9889561 - 2¹ = 9889559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9889501) 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 in 3 ways as a sum of consecutive naturals, for example, 449515 + ... + 449536.

It is an arithmetic number, because the mean of its divisors is an integer number (2697156).

Almost surely, 2^9889561 is an apocalyptic number.

It is an amenable number.

9889561 is a deficient number, since it is larger than the sum of its proper divisors (899063).

9889561 is a wasteful number, since it uses less digits than its factorization.

9889561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899062.

The product of its digits is 155520, while the sum is 46.

The square root of 9889561 is about 3144.7672409894. The cubic root of 9889561 is about 214.6474192307.

The spelling of 9889561 in words is "nine million, eight hundred eighty-nine thousand, five hundred sixty-one".