9981912 has 32 divisors (see below), whose sum is σ = 25260480. Its totient is φ = 3286560.

The previous prime is 9981911. The next prime is 9981913. The reversal of 9981912 is 2191899.

It is a happy number.

9981912 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9981911) and next prime (9981913).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514 + ... + 4497.

It is an arithmetic number, because the mean of its divisors is an integer number (789390).

Almost surely, 2^9981912 is an apocalyptic number.

It is an amenable number.

9981912 is an abundant number, since it is smaller than the sum of its proper divisors (15278568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9981912 is a wasteful number, since it uses less digits than its factorization.

9981912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103 (or 5099 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The square root of 9981912 is about 3159.4164018059. The cubic root of 9981912 is about 215.3134925556.

The spelling of 9981912 in words is "nine million, nine hundred eighty-one thousand, nine hundred twelve".