8638241009 has 2 divisors, whose sum is σ = 8638241010. Its totient is φ = 8638241008.

The previous prime is 8638240993. The next prime is 8638241021. The reversal of 8638241009 is 9001428368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7585887409 + 1052353600 = 87097^2 + 32440^2 .

It is a cyclic number.

It is not a de Polignac number, because 8638241009 - 2⁴ = 8638240993 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 (8638241089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319120504 + 4319120505.

It is an arithmetic number, because the mean of its divisors is an integer number (4319120505).

Almost surely, 2^8638241009 is an apocalyptic number.

It is an amenable number.

8638241009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8638241009 is an equidigital number, since it uses as much as digits as its factorization.

8638241009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 8638241009 is about 92942.1379622827. The cubic root of 8638241009 is about 2051.8318750656.

The spelling of 8638241009 in words is "eight billion, six hundred thirty-eight million, two hundred forty-one thousand, nine".