9939912 has 32 divisors (see below), whose sum is σ = 25097280. Its totient is φ = 3280320.

The previous prime is 9939911. The next prime is 9939913. The reversal of 9939912 is 2199399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9939911) and next prime (9939913).

It is not an unprimeable number, because it can be changed into a prime (9939911) 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, 462 + ... + 4482.

It is an arithmetic number, because the mean of its divisors is an integer number (784290).

Almost surely, 2^9939912 is an apocalyptic number.

It is an amenable number.

9939912 is an abundant number, since it is smaller than the sum of its proper divisors (15157368).

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

9939912 is a wasteful number, since it uses less digits than its factorization.

9939912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133 (or 4129 counting only the distinct ones).

The product of its digits is 39366, while the sum is 42.

The square root of 9939912 is about 3152.7625981034. The cubic root of 9939912 is about 215.0110828972.

Adding to 9939912 its product of digits (39366), we get a triangular number (9979278 = T₄₄₆₇).

The spelling of 9939912 in words is "nine million, nine hundred thirty-nine thousand, nine hundred twelve".