9906791 has 2 divisors, whose sum is σ = 9906792. Its totient is φ = 9906790.

The previous prime is 9906781. The next prime is 9906833. The reversal of 9906791 is 1976099.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1976099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9906791 - 2¹⁴ = 9890407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9906731) 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 as a sum of consecutive naturals, namely, 4953395 + 4953396.

It is an arithmetic number, because the mean of its divisors is an integer number (4953396).

Almost surely, 2^9906791 is an apocalyptic number.

9906791 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906791 is an equidigital number, since it uses as much as digits as its factorization.

9906791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 9906791 is about 3147.5055202493. The cubic root of 9906791 is about 214.7720027617.

The spelling of 9906791 in words is "nine million, nine hundred six thousand, seven hundred ninety-one".