9909910 has 16 divisors (see below), whose sum is σ = 17886096. Its totient is φ = 3953248.

The previous prime is 9909901. The next prime is 9909917. The reversal of 9909910 is 199099.

It is a self number, because there is not a number n which added to its sum of digits gives 9909910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909917) 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 7 ways as a sum of consecutive naturals, for example, 3312 + ... + 5548.

It is an arithmetic number, because the mean of its divisors is an integer number (1117881).

Almost surely, 2^9909910 is an apocalyptic number.

9909910 is a deficient number, since it is larger than the sum of its proper divisors (7976186).

9909910 is a wasteful number, since it uses less digits than its factorization.

9909910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 9909910 is about 3148.0009529859. Note that the first 3 decimals coincide. The cubic root of 9909910 is about 214.7945396118.

The spelling of 9909910 in words is "nine million, nine hundred nine thousand, nine hundred ten".