8711991297 has 12 divisors (see below), whose sum is σ = 13017918420. Its totient is φ = 5607718368.

The previous prime is 8711991293. The next prime is 8711991317. The reversal of 8711991297 is 7921991178.

It can be written as a sum of positive squares in 2 ways, for example, as 5398722576 + 3313268721 = 73476^2 + 57561^2 .

It is not a de Polignac number, because 8711991297 - 2² = 8711991293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8711991293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16689378 + ... + 16689899.

It is an arithmetic number, because the mean of its divisors is an integer number (1084826535).

Almost surely, 2^8711991297 is an apocalyptic number.

8711991297 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

8711991297 is a deficient number, since it is larger than the sum of its proper divisors (4305927123).

8711991297 is a wasteful number, since it uses less digits than its factorization.

8711991297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33379312 (or 33379309 counting only the distinct ones).

The product of its digits is 571536, while the sum is 54.

The square root of 8711991297 is about 93338.0484957769. The cubic root of 8711991297 is about 2057.6546104436.

The spelling of 8711991297 in words is "eight billion, seven hundred eleven million, nine hundred ninety-one thousand, two hundred ninety-seven".