1001000000009 has 16 divisors (see below), whose sum is σ = 1035170435520. Its totient is φ = 967498209600.

The previous prime is 1000999999943. The next prime is 1001000000017. The reversal of 1001000000009 is 9000000001001.

It is not a de Polignac number, because 1001000000009 - 2¹² = 1000999995913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001000006009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522059 + ... + 1508159.

It is an arithmetic number, because the mean of its divisors is an integer number (64698152220).

Almost surely, 2^{1001000000009} is an apocalyptic number.

It is an amenable number.

1001000000009 is a deficient number, since it is larger than the sum of its proper divisors (34170435511).

1001000000009 is a wasteful number, since it uses less digits than its factorization.

1001000000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986440.

The product of its (nonzero) digits is 9, while the sum is 11.

The spelling of 1001000000009 in words is "one trillion, one billion, nine", and thus it is an aban number and an uban number.