6609409 has 2 divisors, whose sum is σ = 6609410. Its totient is φ = 6609408.

The previous prime is 6609353. The next prime is 6609437. The reversal of 6609409 is 9049066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 183184 = 2535^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 6609409 - 2¹¹ = 6607361 is a prime.

It is not a weakly prime, because it can be changed into another prime (6609439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3304704 + 3304705.

It is an arithmetic number, because the mean of its divisors is an integer number (3304705).

Almost surely, 2^6609409 is an apocalyptic number.

It is an amenable number.

6609409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6609409 is an equidigital number, since it uses as much as digits as its factorization.

6609409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6609409 is about 2570.8770876882. The cubic root of 6609409 is about 187.6668405356. Note that the first 3 decimals are identical.

The spelling of 6609409 in words is "six million, six hundred nine thousand, four hundred nine".