9909895 has 32 divisors (see below), whose sum is σ = 13592448. Its totient is φ = 6893568.

The previous prime is 9909881. The next prime is 9909901. The reversal of 9909895 is 5989099.

It is not a de Polignac number, because 9909895 - 2¹¹ = 9907847 is a prime.

It is a super-2 number, since 2×9909895² = 196412037822050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 72267 + ... + 72403.

It is an arithmetic number, because the mean of its divisors is an integer number (424764).

Almost surely, 2^9909895 is an apocalyptic number.

9909895 is a deficient number, since it is larger than the sum of its proper divisors (3682553).

9909895 is a wasteful number, since it uses less digits than its factorization.

9909895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its (nonzero) digits is 262440, while the sum is 49.

The square root of 9909895 is about 3147.9985705206. The cubic root of 9909895 is about 214.7944312381.

The spelling of 9909895 in words is "nine million, nine hundred nine thousand, eight hundred ninety-five".