10009909 has 16 divisors (see below), whose sum is σ = 12394368. Its totient is φ = 7872192.

The previous prime is 10009907. The next prime is 10009921. The reversal of 10009909 is 90990001.

It is a cyclic number.

It is not a de Polignac number, because 10009909 - 2¹ = 10009907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10009907) 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 15 ways as a sum of consecutive naturals, for example, 28674 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (774648).

Almost surely, 2^10009909 is an apocalyptic number.

It is an amenable number.

10009909 is a deficient number, since it is larger than the sum of its proper divisors (2384459).

10009909 is a wasteful number, since it uses less digits than its factorization.

10009909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 10009909 is about 3163.8440227040. The cubic root of 10009909 is about 215.5146064895.

The spelling of 10009909 in words is "ten million, nine thousand, nine hundred nine".