8109911273 has 2 divisors, whose sum is σ = 8109911274. Its totient is φ = 8109911272.

The previous prime is 8109911239. The next prime is 8109911279. The reversal of 8109911273 is 3721199018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6708756649 + 1401154624 = 81907^2 + 37432^2 .

It is a cyclic number.

It is not a de Polignac number, because 8109911273 - 2¹⁸ = 8109649129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8109911273.

It is not a weakly prime, because it can be changed into another prime (8109911279) 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, 4054955636 + 4054955637.

It is an arithmetic number, because the mean of its divisors is an integer number (4054955637).

Almost surely, 2^8109911273 is an apocalyptic number.

It is an amenable number.

8109911273 is a deficient number, since it is larger than the sum of its proper divisors (1).

8109911273 is an equidigital number, since it uses as much as digits as its factorization.

8109911273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 8109911273 is about 90055.0457942252. The cubic root of 8109911273 is about 2009.1176438716.

The spelling of 8109911273 in words is "eight billion, one hundred nine million, nine hundred eleven thousand, two hundred seventy-three".