9811117249 has 2 divisors, whose sum is σ = 9811117250. Its totient is φ = 9811117248.

The previous prime is 9811117219. The next prime is 9811117273. The reversal of 9811117249 is 9427111189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9300673600 + 510443649 = 96440^2 + 22593^2 .

It is a cyclic number.

It is not a de Polignac number, because 9811117249 - 2²¹ = 9809020097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9811117219) 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, 4905558624 + 4905558625.

It is an arithmetic number, because the mean of its divisors is an integer number (4905558625).

Almost surely, 2^9811117249 is an apocalyptic number.

It is an amenable number.

9811117249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9811117249 is an equidigital number, since it uses as much as digits as its factorization.

9811117249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 43.

The square root of 9811117249 is about 99051.0840374804. The cubic root of 9811117249 is about 2140.7838605868.

The spelling of 9811117249 in words is "nine billion, eight hundred eleven million, one hundred seventeen thousand, two hundred forty-nine".