9981910 has 16 divisors (see below), whose sum is σ = 18017712. Its totient is φ = 3981600.

The previous prime is 9981899. The next prime is 9981911. The reversal of 9981910 is 191899.

It is a super-4 number, since 4×9981910⁴ (a number of 29 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9981910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981911) 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, 3025 + ... + 5395.

It is an arithmetic number, because the mean of its divisors is an integer number (1126107).

Almost surely, 2^9981910 is an apocalyptic number.

9981910 is a deficient number, since it is larger than the sum of its proper divisors (8035802).

9981910 is a wasteful number, since it uses less digits than its factorization.

9981910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 9981910 is about 3159.4160852917. The cubic root of 9981910 is about 215.3134781754.

The spelling of 9981910 in words is "nine million, nine hundred eighty-one thousand, nine hundred ten".