10090909 has 4 divisors (see below), whose sum is σ = 10204380. Its totient is φ = 9977440.

The previous prime is 10090897. The next prime is 10090933. The reversal of 10090909 is 90909001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90909001 = 2141 ⋅42461.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 3790809 = 2510^2 + 1947^2 .

It is a cyclic number.

It is not a de Polignac number, because 10090909 - 2⁷ = 10090781 is a prime.

It is a Duffinian number.

10090909 is a modest number, since divided by 90909 gives 10 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10090999) 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, 56602 + ... + 56779.

It is an arithmetic number, because the mean of its divisors is an integer number (2551095).

Almost surely, 2^10090909 is an apocalyptic number.

It is an amenable number.

10090909 is a deficient number, since it is larger than the sum of its proper divisors (113471).

10090909 is an equidigital number, since it uses as much as digits as its factorization.

10090909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113470.

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

The square root of 10090909 is about 3176.6191147193. The cubic root of 10090909 is about 216.0943589222.

The spelling of 10090909 in words is "ten million, ninety thousand, nine hundred nine".