2239709 has 2 divisors, whose sum is σ = 2239710. Its totient is φ = 2239708.

The previous prime is 2239703. The next prime is 2239711. The reversal of 2239709 is 9079322.

2239709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2184484 + 55225 = 1478^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2239709 - 2⁸ = 2239453 is a prime.

Together with 2239711, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2239703) 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, 1119854 + 1119855.

It is an arithmetic number, because the mean of its divisors is an integer number (1119855).

2^2239709 is an apocalyptic number.

It is an amenable number.

2239709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2239709 is an equidigital number, since it uses as much as digits as its factorization.

2239709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 2239709 is about 1496.5657352753. The cubic root of 2239709 is about 130.8369862080.

The spelling of 2239709 in words is "two million, two hundred thirty-nine thousand, seven hundred nine".