200000900009 has 2 divisors, whose sum is σ = 200000900010. Its totient is φ = 200000900008.

The previous prime is 200000899999. The next prime is 200000900039. The reversal of 200000900009 is 900009000002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157135338409 + 42865561600 = 396403^2 + 207040^2 .

It is a cyclic number.

It is not a de Polignac number, because 200000900009 - 2⁴ = 200000899993 is a prime.

It is a Sophie Germain prime.

200000900009 is a modest number, since divided by 900009 gives 20 as remainder.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (200000900039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000450004 + 100000450005.

It is an arithmetic number, because the mean of its divisors is an integer number (100000450005).

Almost surely, 2^200000900009 is an apocalyptic number.

It is an amenable number.

200000900009 is a deficient number, since it is larger than the sum of its proper divisors (1).

200000900009 is an equidigital number, since it uses as much as digits as its factorization.

200000900009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The spelling of 200000900009 in words is "two hundred billion, nine hundred thousand, nine".