9879108181 has 2 divisors, whose sum is σ = 9879108182. Its totient is φ = 9879108180.

The previous prime is 9879108133. The next prime is 9879108191. The reversal of 9879108181 is 1818019789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6032007556 + 3847100625 = 77666^2 + 62025^2 .

It is an emirp because it is prime and its reverse (1818019789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9879108181 is a prime.

It is a super-2 number, since 2×9879108181² (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 (9879108191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939554090 + 4939554091.

It is an arithmetic number, because the mean of its divisors is an integer number (4939554091).

Almost surely, 2^9879108181 is an apocalyptic number.

It is an amenable number.

9879108181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9879108181 is an equidigital number, since it uses as much as digits as its factorization.

9879108181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 52.

The square root of 9879108181 is about 99393.7029242799. The cubic root of 9879108181 is about 2145.7176836434.

The spelling of 9879108181 in words is "nine billion, eight hundred seventy-nine million, one hundred eight thousand, one hundred eighty-one".