9986849 has 2 divisors, whose sum is σ = 9986850. Its totient is φ = 9986848.

The previous prime is 9986831. The next prime is 9986857. The reversal of 9986849 is 9486899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6630625 + 3356224 = 2575^2 + 1832^2 .

It is a cyclic number.

It is not a de Polignac number, because 9986849 - 2⁸ = 9986593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 9986849.

It is not a weakly prime, because it can be changed into another prime (9986749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993424 + 4993425.

It is an arithmetic number, because the mean of its divisors is an integer number (4993425).

Almost surely, 2^9986849 is an apocalyptic number.

It is an amenable number.

9986849 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986849 is an equidigital number, since it uses as much as digits as its factorization.

9986849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 53.

The square root of 9986849 is about 3160.1976204029. The cubic root of 9986849 is about 215.3489843368.

The spelling of 9986849 in words is "nine million, nine hundred eighty-six thousand, eight hundred forty-nine".