10000009 has 4 divisors (see below), whose sum is σ = 10434816. Its totient is φ = 9565204.

The previous prime is 9999991. The next prime is 10000019. The reversal of 10000009 is 90000001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10000009 is a prime.

It is a Duffinian number.

10000009 is a modest number, since divided by 9 gives 1 as remainder.

It is not an unprimeable number, because it can be changed into a prime (10000019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217369 + ... + 217414.

It is an arithmetic number, because the mean of its divisors is an integer number (2608704).

Almost surely, 2^10000009 is an apocalyptic number.

It is an amenable number.

10000009 is a deficient number, since it is larger than the sum of its proper divisors (434807).

10000009 is an equidigital number, since it uses as much as digits as its factorization.

10000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434806.

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

The square root of 10000009 is about 3162.2790831930. The cubic root of 10000009 is about 215.4435336362.

Subtracting from 10000009 its sum of digits (10), we obtain a palindrome (9999999).

It can be divided in two parts, 1000000 and 9, that multiplied together give a square (9000000 = 3000²).

The spelling of 10000009 in words is "ten million, nine", and thus it is an aban number and an uban number.