2003011209 has 6 divisors (see below), whose sum is σ = 2893238426. Its totient is φ = 1335340800.

The previous prime is 2003011187. The next prime is 2003011211. The reversal of 2003011209 is 9021103002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1684281600 + 318729609 = 41040^2 + 17853^2 .

It is not a de Polignac number, because 2003011209 - 2⁵ = 2003011177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003011191 and 2003011200.

It is not an unprimeable number, because it can be changed into a prime (2003011249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111278392 + ... + 111278409.

Almost surely, 2^2003011209 is an apocalyptic number.

It is an amenable number.

2003011209 is a deficient number, since it is larger than the sum of its proper divisors (890227217).

2003011209 is a wasteful number, since it uses less digits than its factorization.

2003011209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222556807 (or 222556804 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2003011209 is about 44755.0132275704. The cubic root of 2003011209 is about 1260.5530470891.

The spelling of 2003011209 in words is "two billion, three million, eleven thousand, two hundred nine".