6944009 has 2 divisors, whose sum is σ = 6944010. Its totient is φ = 6944008.

The previous prime is 6943991. The next prime is 6944011. The reversal of 6944009 is 9004496.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 784 = 2635^2 + 28^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6944009 is a prime.

Together with 6944011, 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 (6944059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472004 + 3472005.

It is an arithmetic number, because the mean of its divisors is an integer number (3472005).

Almost surely, 2^6944009 is an apocalyptic number.

It is an amenable number.

6944009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6944009 is an equidigital number, since it uses as much as digits as its factorization.

6944009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6944009 is about 2635.1487624041. The cubic root of 6944009 is about 190.7817193332.

The spelling of 6944009 in words is "six million, nine hundred forty-four thousand, nine".