1008820009 has 2 divisors, whose sum is σ = 1008820010. Its totient is φ = 1008820008.

The previous prime is 1008819989. The next prime is 1008820049. The reversal of 1008820009 is 9000288001.

1008820009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 951105600 + 57714409 = 30840^2 + 7597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008820009 - 2⁷ = 1008819881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1008820049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504410004 + 504410005.

It is an arithmetic number, because the mean of its divisors is an integer number (504410005).

Almost surely, 2^1008820009 is an apocalyptic number.

It is an amenable number.

1008820009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008820009 is an equidigital number, since it uses as much as digits as its factorization.

1008820009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1008820009 is about 31761.9270353674. The cubic root of 1008820009 is about 1002.9314014887.

The spelling of 1008820009 in words is "one billion, eight million, eight hundred twenty thousand, nine".