9961253117 has 2 divisors, whose sum is σ = 9961253118. Its totient is φ = 9961253116.

The previous prime is 9961253077. The next prime is 9961253119. The reversal of 9961253117 is 7113521699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4992976921 + 4968276196 = 70661^2 + 70486^2 .

It is an emirp because it is prime and its reverse (7113521699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9961253117 - 2⁶ = 9961253053 is a prime.

Together with 9961253119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9961253119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980626558 + 4980626559.

It is an arithmetic number, because the mean of its divisors is an integer number (4980626559).

Almost surely, 2^9961253117 is an apocalyptic number.

It is an amenable number.

9961253117 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961253117 is an equidigital number, since it uses as much as digits as its factorization.

9961253117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 44.

The square root of 9961253117 is about 99806.0775554275. The cubic root of 9961253117 is about 2151.6485007602.

The spelling of 9961253117 in words is "nine billion, nine hundred sixty-one million, two hundred fifty-three thousand, one hundred seventeen".