4509009 has 6 divisors (see below), whose sum is σ = 6513026. Its totient is φ = 3006000.

The previous prime is 4508983. The next prime is 4509013. The reversal of 4509009 is 9009054.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2259009 + 2250000 = 1503^2 + 1500^2 .

It is not a de Polignac number, because 4509009 - 2²⁰ = 3460433 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (4509019) 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, 250492 + ... + 250509.

Almost surely, 2^4509009 is an apocalyptic number.

It is an amenable number.

4509009 is a deficient number, since it is larger than the sum of its proper divisors (2004017).

4509009 is a wasteful number, since it uses less digits than its factorization.

4509009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501007 (or 501004 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 4509009 is about 2123.4427235035. The cubic root of 4509009 is about 165.2064633093.

The spelling of 4509009 in words is "four million, five hundred nine thousand, nine".