8118397289 has 2 divisors, whose sum is σ = 8118397290. Its totient is φ = 8118397288.

The previous prime is 8118397241. The next prime is 8118397307. The reversal of 8118397289 is 9827938118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7884552025 + 233845264 = 88795^2 + 15292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8118397289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8118397789) 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, 4059198644 + 4059198645.

It is an arithmetic number, because the mean of its divisors is an integer number (4059198645).

Almost surely, 2^8118397289 is an apocalyptic number.

It is an amenable number.

8118397289 is a deficient number, since it is larger than the sum of its proper divisors (1).

8118397289 is an equidigital number, since it uses as much as digits as its factorization.

8118397289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 56.

The square root of 8118397289 is about 90102.1491919033. The cubic root of 8118397289 is about 2009.8181637111.

The spelling of 8118397289 in words is "eight billion, one hundred eighteen million, three hundred ninety-seven thousand, two hundred eighty-nine".