8781532009 has 2 divisors, whose sum is σ = 8781532010. Its totient is φ = 8781532008.

The previous prime is 8781532003. The next prime is 8781532013. The reversal of 8781532009 is 9002351878.

8781532009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8060448400 + 721083609 = 89780^2 + 26853^2 .

It is a cyclic number.

It is not a de Polignac number, because 8781532009 - 2⁵ = 8781531977 is a prime.

It is not a weakly prime, because it can be changed into another prime (8781532003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4390766004 + 4390766005.

It is an arithmetic number, because the mean of its divisors is an integer number (4390766005).

Almost surely, 2^8781532009 is an apocalyptic number.

It is an amenable number.

8781532009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8781532009 is an equidigital number, since it uses as much as digits as its factorization.

8781532009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 8781532009 is about 93709.8287747875. The cubic root of 8781532009 is about 2063.1149663917.

The spelling of 8781532009 in words is "eight billion, seven hundred eighty-one million, five hundred thirty-two thousand, nine".