10209905 has 8 divisors (see below), whose sum is σ = 12317184. Its totient is φ = 8124400.

The previous prime is 10209883. The next prime is 10209931. The reversal of 10209905 is 50990201.

It is a happy number.

10209905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10209905 - 2¹⁰ = 10208881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4391 + ... + 6300.

It is an arithmetic number, because the mean of its divisors is an integer number (1539648).

Almost surely, 2^10209905 is an apocalyptic number.

It is an amenable number.

10209905 is a deficient number, since it is larger than the sum of its proper divisors (2107279).

10209905 is a wasteful number, since it uses less digits than its factorization.

10209905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10887.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 10209905 is about 3195.2941961578. The cubic root of 10209905 is about 216.9404651674.

The spelling of 10209905 in words is "ten million, two hundred nine thousand, nine hundred five".