6909109 has 2 divisors, whose sum is σ = 6909110. Its totient is φ = 6909108.

The previous prime is 6909059. The next prime is 6909113. The reversal of 6909109 is 9019096.

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., 6874884 + 34225 = 2622^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 6909109 - 2⁹ = 6908597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6909709) 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, 3454554 + 3454555.

It is an arithmetic number, because the mean of its divisors is an integer number (3454555).

Almost surely, 2^6909109 is an apocalyptic number.

It is an amenable number.

6909109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909109 is an equidigital number, since it uses as much as digits as its factorization.

6909109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 6909109 is about 2628.5184039683. The cubic root of 6909109 is about 190.4615647986.

The spelling of 6909109 in words is "six million, nine hundred nine thousand, one hundred nine".