8756739989 has 2 divisors, whose sum is σ = 8756739990. Its totient is φ = 8756739988.

The previous prime is 8756739949. The next prime is 8756739997. The reversal of 8756739989 is 9899376578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5748217489 + 3008522500 = 75817^2 + 54850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8756739989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8756739919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4378369994 + 4378369995.

It is an arithmetic number, because the mean of its divisors is an integer number (4378369995).

Almost surely, 2^8756739989 is an apocalyptic number.

It is an amenable number.

8756739989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8756739989 is an equidigital number, since it uses as much as digits as its factorization.

8756739989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205752960, while the sum is 71.

The square root of 8756739989 is about 93577.4544909189. The cubic root of 8756739989 is about 2061.1716077798.

The spelling of 8756739989 in words is "eight billion, seven hundred fifty-six million, seven hundred thirty-nine thousand, nine hundred eighty-nine".