2003009 has 2 divisors, whose sum is σ = 2003010. Its totient is φ = 2003008.

The previous prime is 2002997. The next prime is 2003011. The reversal of 2003009 is 9003002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 784 = 1415^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003009 - 2⁴ = 2002993 is a prime.

It is a Sophie Germain prime.

Together with 2003011, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2002984 and 2003002.

It is not a weakly prime, because it can be changed into another prime (2003509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001504 + 1001505.

It is an arithmetic number, because the mean of its divisors is an integer number (1001505).

2^2003009 is an apocalyptic number.

It is an amenable number.

2003009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003009 is an equidigital number, since it uses as much as digits as its factorization.

2003009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 2003009 is about 1415.2770046885. The cubic root of 2003009 is about 126.0552583693.

The spelling of 2003009 in words is "two million, three thousand, nine".