6920909 has 2 divisors, whose sum is σ = 6920910. Its totient is φ = 6920908.

The previous prime is 6920869. The next prime is 6920917. The reversal of 6920909 is 9090296.

6920909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4502884 + 2418025 = 2122^2 + 1555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6920909 is a prime.

It is a Sophie Germain prime.

6920909 is a modest number, since divided by 909 gives 692 as remainder.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6920939) 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, 3460454 + 3460455.

It is an arithmetic number, because the mean of its divisors is an integer number (3460455).

Almost surely, 2^6920909 is an apocalyptic number.

It is an amenable number.

6920909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6920909 is an equidigital number, since it uses as much as digits as its factorization.

6920909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 6920909 is about 2630.7620568953. The cubic root of 6920909 is about 190.5699322795.

The spelling of 6920909 in words is "six million, nine hundred twenty thousand, nine hundred nine".