9996891 has 4 divisors (see below), whose sum is σ = 13329192. Its totient is φ = 6664592.

The previous prime is 9996887. The next prime is 9996929. The reversal of 9996891 is 1986999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9996891 - 2² = 9996887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9996491) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1666146 + ... + 1666151.

It is an arithmetic number, because the mean of its divisors is an integer number (3332298).

Almost surely, 2^9996891 is an apocalyptic number.

9996891 is a deficient number, since it is larger than the sum of its proper divisors (3332301).

9996891 is a wasteful number, since it uses less digits than its factorization.

9996891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332300.

The product of its digits is 314928, while the sum is 51.

The square root of 9996891 is about 3161.7860458924. The cubic root of 9996891 is about 215.4211395641.

The spelling of 9996891 in words is "nine million, nine hundred ninety-six thousand, eight hundred ninety-one".