9847977109 has 2 divisors, whose sum is σ = 9847977110. Its totient is φ = 9847977108.

The previous prime is 9847977101. The next prime is 9847977119. The reversal of 9847977109 is 9017797489.

9847977109 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 can be written as a sum of positive squares in only one way, i.e., 6817804900 + 3030172209 = 82570^2 + 55047^2 .

It is an emirp because it is prime and its reverse (9017797489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9847977109 - 2³ = 9847977101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9847977101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4923988554 + 4923988555.

It is an arithmetic number, because the mean of its divisors is an integer number (4923988555).

Almost surely, 2^9847977109 is an apocalyptic number.

It is an amenable number.

9847977109 is a deficient number, since it is larger than the sum of its proper divisors (1).

9847977109 is an equidigital number, since it uses as much as digits as its factorization.

9847977109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8001504, while the sum is 61.

The square root of 9847977109 is about 99236.9745054735. The cubic root of 9847977109 is about 2143.4614482705.

The spelling of 9847977109 in words is "nine billion, eight hundred forty-seven million, nine hundred seventy-seven thousand, one hundred nine".