4402009 has 2 divisors, whose sum is σ = 4402010. Its totient is φ = 4402008.

The previous prime is 4402007. The next prime is 4402019. The reversal of 4402009 is 9002044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 1968409 = 1560^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 4402009 - 2¹ = 4402007 is a prime.

Together with 4402007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4402003) 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, 2201004 + 2201005.

It is an arithmetic number, because the mean of its divisors is an integer number (2201005).

Almost surely, 2^4402009 is an apocalyptic number.

It is an amenable number.

4402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4402009 is an equidigital number, since it uses as much as digits as its factorization.

4402009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4402009 is about 2098.0965182756. The cubic root of 4402009 is about 163.8891899683.

The spelling of 4402009 in words is "four million, four hundred two thousand, nine".