6708409 has 2 divisors, whose sum is σ = 6708410. Its totient is φ = 6708408.

The previous prime is 6708397. The next prime is 6708413. The reversal of 6708409 is 9048076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 558009 = 2480^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 6708409 - 2⁷ = 6708281 is a prime.

It is a super-2 number, since 2×6708409² = 90005502622562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6708439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3354204 + 3354205.

It is an arithmetic number, because the mean of its divisors is an integer number (3354205).

Almost surely, 2^6708409 is an apocalyptic number.

It is an amenable number.

6708409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6708409 is an equidigital number, since it uses as much as digits as its factorization.

6708409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 6708409 is about 2590.0596518227. The cubic root of 6708409 is about 188.5991991710.

It can be divided in two parts, 6708 and 409, that added together give a palindrome (7117).

The spelling of 6708409 in words is "six million, seven hundred eight thousand, four hundred nine".