2009489 has 2 divisors, whose sum is σ = 2009490. Its totient is φ = 2009488.

The previous prime is 2009467. The next prime is 2009503. The reversal of 2009489 is 9849002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2007889 + 1600 = 1417^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009489 - 2⁸ = 2009233 is a prime.

It is a super-2 number, since 2×2009489² = 8076092082242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2009789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004744 + 1004745.

It is an arithmetic number, because the mean of its divisors is an integer number (1004745).

2^2009489 is an apocalyptic number.

It is an amenable number.

2009489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009489 is an equidigital number, since it uses as much as digits as its factorization.

2009489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2009489 is about 1417.5644606155. The cubic root of 2009489 is about 126.1910472073.

The spelling of 2009489 in words is "two million, nine thousand, four hundred eighty-nine".