6909108286609 has 2 divisors, whose sum is σ = 6909108286610. Its totient is φ = 6909108286608.

The previous prime is 6909108286559. The next prime is 6909108286669. The reversal of 6909108286609 is 9066828019096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5743226629009 + 1165881657600 = 2396503^2 + 1079760^2 .

It is a cyclic number.

It is not a de Polignac number, because 6909108286609 - 2¹⁵ = 6909108253841 is a prime.

It is not a weakly prime, because it can be changed into another prime (6909108286669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454554143304 + 3454554143305.

It is an arithmetic number, because the mean of its divisors is an integer number (3454554143305).

Almost surely, 2^{6909108286609} is an apocalyptic number.

It is an amenable number.

6909108286609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909108286609 is an equidigital number, since it uses as much as digits as its factorization.

6909108286609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 6909108286609 in words is "six trillion, nine hundred nine billion, one hundred eight million, two hundred eighty-six thousand, six hundred nine".