9889965 has 16 divisors (see below), whose sum is σ = 17582400. Its totient is φ = 5274576.

The previous prime is 9889951. The next prime is 9889969. The reversal of 9889965 is 5699889.

It is not a de Polignac number, because 9889965 - 2⁵ = 9889933 is a prime.

It is a super-2 number, since 2×9889965² = 195622815402450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889969) 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 15 ways as a sum of consecutive naturals, for example, 36495 + ... + 36764.

It is an arithmetic number, because the mean of its divisors is an integer number (1098900).

Almost surely, 2^9889965 is an apocalyptic number.

It is an amenable number.

9889965 is a deficient number, since it is larger than the sum of its proper divisors (7692435).

9889965 is a wasteful number, since it uses less digits than its factorization.

9889965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73273 (or 73267 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 9889965 is about 3144.8314740221. The cubic root of 9889965 is about 214.6503420560.

The spelling of 9889965 in words is "nine million, eight hundred eighty-nine thousand, nine hundred sixty-five".