9906891 has 8 divisors (see below), whose sum is σ = 13224000. Its totient is φ = 6597192.

The previous prime is 9906877. The next prime is 9906917. The reversal of 9906891 is 1986099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9906891 - 2¹⁹ = 9382603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9906851) 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, 3396 + ... + 5598.

It is an arithmetic number, because the mean of its divisors is an integer number (1653000).

Almost surely, 2^9906891 is an apocalyptic number.

9906891 is a deficient number, since it is larger than the sum of its proper divisors (3317109).

9906891 is a wasteful number, since it uses less digits than its factorization.

9906891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 9906891 is about 3147.5214058049. The cubic root of 9906891 is about 214.7727254017.

The spelling of 9906891 in words is "nine million, nine hundred six thousand, eight hundred ninety-one".