9991016 has 32 divisors (see below), whose sum is σ = 22343040. Its totient is φ = 4095168.

The previous prime is 9990997. The next prime is 9991027. The reversal of 9991016 is 6101999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2591 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (698220).

Almost surely, 2^9991016 is an apocalyptic number.

It is an amenable number.

9991016 is an abundant number, since it is smaller than the sum of its proper divisors (12352024).

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

9991016 is a wasteful number, since it uses less digits than its factorization.

9991016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7793 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 9991016 is about 3160.8568458568. The cubic root of 9991016 is about 215.3789315350.

The spelling of 9991016 in words is "nine million, nine hundred ninety-one thousand, sixteen".