10000000009 has 4 divisors (see below), whose sum is σ = 10000328980. Its totient is φ = 9999671040.

The previous prime is 9999999967. The next prime is 10000000019. The reversal of 10000000009 is 90000000001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90000000001 = 113 ⋅796460177.

It can be written as a sum of positive squares in 2 ways, for example, as 9533569600 + 466430409 = 97640^2 + 21597^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000000009 - 2⁷ = 9999999881 is a prime.

It is a Duffinian number.

10000000009 is a modest number, since divided by 9 gives 1 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 9999999932 and 10000000004.

It is not an unprimeable number, because it can be changed into a prime (10000000019) 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 in 3 ways as a sum of consecutive naturals, for example, 113652 + ... + 181429.

It is an arithmetic number, because the mean of its divisors is an integer number (2500082245).

Almost surely, 2^10000000009 is an apocalyptic number.

It is an amenable number.

10000000009 is a deficient number, since it is larger than the sum of its proper divisors (328971).

10000000009 is an equidigital number, since it uses as much as digits as its factorization.

10000000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328970.

The product of its (nonzero) digits is 9, while the sum is 10.

Subtracting from 10000000009 its sum of digits (10), we obtain a palindrome (9999999999).

The spelling of 10000000009 in words is "ten billion, nine", and thus it is an aban number and an uban number.