1005230209 has 4 divisors (see below), whose sum is σ = 1005697540. Its totient is φ = 1004762880.

The previous prime is 1005230197. The next prime is 1005230227. The reversal of 1005230209 is 9020325001.

1005230209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 716739984 + 288490225 = 26772^2 + 16985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005230209 - 2⁷ = 1005230081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005230209.

It is not an unprimeable number, because it can be changed into a prime (1005230309) 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, 230424 + ... + 234745.

It is an arithmetic number, because the mean of its divisors is an integer number (251424385).

Almost surely, 2^1005230209 is an apocalyptic number.

It is an amenable number.

1005230209 is a deficient number, since it is larger than the sum of its proper divisors (467331).

1005230209 is an equidigital number, since it uses as much as digits as its factorization.

1005230209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467330.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1005230209 is about 31705.3656184564. The cubic root of 1005230209 is about 1001.7403723470.

The spelling of 1005230209 in words is "one billion, five million, two hundred thirty thousand, two hundred nine".