9989897 has 8 divisors (see below), whose sum is σ = 10803456. Its totient is φ = 9201472.

The previous prime is 9989887. The next prime is 9989899. The reversal of 9989897 is 7989899.

9989897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9989897 - 2¹⁰ = 9988873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5453 + ... + 7050.

It is an arithmetic number, because the mean of its divisors is an integer number (1350432).

Almost surely, 2^9989897 is an apocalyptic number.

It is an amenable number.

9989897 is a deficient number, since it is larger than the sum of its proper divisors (813559).

9989897 is a wasteful number, since it uses less digits than its factorization.

9989897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12567.

The product of its digits is 2939328, while the sum is 59.

The square root of 9989897 is about 3160.6798319349. The cubic root of 9989897 is about 215.3708903767.

The spelling of 9989897 in words is "nine million, nine hundred eighty-nine thousand, eight hundred ninety-seven".