10000809 has 24 divisors (see below), whose sum is σ = 17780672. Its totient is φ = 5274720.

The previous prime is 10000799. The next prime is 10000813. The reversal of 10000809 is 90800001.

It is not a de Polignac number, because 10000809 - 2¹⁵ = 9968041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10000791 and 10000800.

It is not an unprimeable number, because it can be changed into a prime (10000819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5287 + ... + 6924.

Almost surely, 2^10000809 is an apocalyptic number.

It is an amenable number.

10000809 is a deficient number, since it is larger than the sum of its proper divisors (7779863).

10000809 is a wasteful number, since it uses less digits than its factorization.

10000809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12237 (or 12234 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 10000809 is about 3162.4055717128. The cubic root of 10000809 is about 215.4492786387.

The spelling of 10000809 in words is "ten million, eight hundred nine", and thus it is an aban number.