1000002091909 has 2 divisors, whose sum is σ = 1000002091910. Its totient is φ = 1000002091908.

The previous prime is 1000002091903. The next prime is 1000002091967. The reversal of 1000002091909 is 9091902000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903349499809 + 96652592100 = 950447^2 + 310890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000002091909 - 2¹⁵ = 1000002059141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000002091903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001045954 + 500001045955.

It is an arithmetic number, because the mean of its divisors is an integer number (500001045955).

Almost surely, 2^{1000002091909} is an apocalyptic number.

It is an amenable number.

1000002091909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000002091909 is an equidigital number, since it uses as much as digits as its factorization.

1000002091909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 1000002091909 in words is "one trillion, two million, ninety-one thousand, nine hundred nine".