9986791 has 2 divisors, whose sum is σ = 9986792. Its totient is φ = 9986790.

The previous prime is 9986783. The next prime is 9986813. The reversal of 9986791 is 1976899.

9986791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9986791 - 2³ = 9986783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993395 + 4993396.

It is an arithmetic number, because the mean of its divisors is an integer number (4993396).

Almost surely, 2^9986791 is an apocalyptic number.

9986791 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986791 is an equidigital number, since it uses as much as digits as its factorization.

9986791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 9986791 is about 3160.1884437483. The cubic root of 9986791 is about 215.3485674464.

The spelling of 9986791 in words is "nine million, nine hundred eighty-six thousand, seven hundred ninety-one".