9986646823 has 2 divisors, whose sum is σ = 9986646824. Its totient is φ = 9986646822.

The previous prime is 9986646811. The next prime is 9986646833. The reversal of 9986646823 is 3286466899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9986646823 is a prime.

It is a super-2 number, since 2×9986646823² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986646833) 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, 4993323411 + 4993323412.

It is an arithmetic number, because the mean of its divisors is an integer number (4993323412).

Almost surely, 2^9986646823 is an apocalyptic number.

9986646823 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986646823 is an equidigital number, since it uses as much as digits as its factorization.

9986646823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 61.

The square root of 9986646823 is about 99933.2118116895. The cubic root of 9986646823 is about 2153.4753112882.

It can be divided in two parts, 99866 and 46823, that added together give a square (146689 = 383²).

The spelling of 9986646823 in words is "nine billion, nine hundred eighty-six million, six hundred forty-six thousand, eight hundred twenty-three".