4209009 has 16 divisors (see below), whose sum is σ = 6588288. Its totient is φ = 2339712.

The previous prime is 4208999. The next prime is 4209011. The reversal of 4209009 is 9009024.

It is not a de Polignac number, because 4209009 - 2⁸ = 4208753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4209009.

It is not an unprimeable number, because it can be changed into a prime (4209109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1932 + ... + 3485.

It is an arithmetic number, because the mean of its divisors is an integer number (411768).

Almost surely, 2^4209009 is an apocalyptic number.

It is an amenable number.

4209009 is a deficient number, since it is larger than the sum of its proper divisors (2379279).

4209009 is a wasteful number, since it uses less digits than its factorization.

4209009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 4209009 is about 2051.5869467317. The cubic root of 4209009 is about 161.4581423663.

The spelling of 4209009 in words is "four million, two hundred nine thousand, nine".