9991046 has 16 divisors (see below), whose sum is σ = 16254000. Its totient is φ = 4578528.

The previous prime is 9991027. The next prime is 9991057. The reversal of 9991046 is 6401999.

It is a Curzon number.

It is a congruent number.

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, 2585 + ... + 5163.

It is an arithmetic number, because the mean of its divisors is an integer number (1015875).

Almost surely, 2^9991046 is an apocalyptic number.

9991046 is a deficient number, since it is larger than the sum of its proper divisors (6262954).

9991046 is a wasteful number, since it uses less digits than its factorization.

9991046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 9991046 is about 3160.8615914019. The cubic root of 9991046 is about 215.3791471074.

The spelling of 9991046 in words is "nine million, nine hundred ninety-one thousand, forty-six".