8709719489 has 2 divisors, whose sum is σ = 8709719490. Its totient is φ = 8709719488.

The previous prime is 8709719477. The next prime is 8709719527. The reversal of 8709719489 is 9849179078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7884019264 + 825700225 = 88792^2 + 28735^2 .

It is a cyclic number.

It is not a de Polignac number, because 8709719489 - 2³² = 4414752193 is a prime.

It is a super-2 number, since 2×8709719489² (a number of 21 digits) contains 22 as substring.

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 (8709713489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4354859744 + 4354859745.

It is an arithmetic number, because the mean of its divisors is an integer number (4354859745).

Almost surely, 2^8709719489 is an apocalyptic number.

It is an amenable number.

8709719489 is a deficient number, since it is larger than the sum of its proper divisors (1).

8709719489 is an equidigital number, since it uses as much as digits as its factorization.

8709719489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 62.

The square root of 8709719489 is about 93325.8779171136. The cubic root of 8709719489 is about 2057.4757381118.

The spelling of 8709719489 in words is "eight billion, seven hundred nine million, seven hundred nineteen thousand, four hundred eighty-nine".