8643730009 has 2 divisors, whose sum is σ = 8643730010. Its totient is φ = 8643730008.

The previous prime is 8643730001. The next prime is 8643730033. The reversal of 8643730009 is 9000373468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4593043984 + 4050686025 = 67772^2 + 63645^2 .

It is a cyclic number.

It is not a de Polignac number, because 8643730009 - 2³ = 8643730001 is a prime.

It is not a weakly prime, because it can be changed into another prime (8643730001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321865004 + 4321865005.

It is an arithmetic number, because the mean of its divisors is an integer number (4321865005).

Almost surely, 2^8643730009 is an apocalyptic number.

It is an amenable number.

8643730009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643730009 is an equidigital number, since it uses as much as digits as its factorization.

8643730009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 8643730009 is about 92971.6623977435. The cubic root of 8643730009 is about 2052.2663817544.

The spelling of 8643730009 in words is "eight billion, six hundred forty-three million, seven hundred thirty thousand, nine".