6966809 has 2 divisors, whose sum is σ = 6966810. Its totient is φ = 6966808.

The previous prime is 6966803. The next prime is 6966811. The reversal of 6966809 is 9086696.

6966809 is nontrivially palindromic in base 11.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 1373584 = 2365^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 6966809 - 2¹² = 6962713 is a prime.

Together with 6966811, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 6966809.

It is not a weakly prime, because it can be changed into another prime (6966803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3483404 + 3483405.

It is an arithmetic number, because the mean of its divisors is an integer number (3483405).

Almost surely, 2^6966809 is an apocalyptic number.

It is an amenable number.

6966809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6966809 is an equidigital number, since it uses as much as digits as its factorization.

6966809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 6966809 is about 2639.4713485848. The cubic root of 6966809 is about 190.9902958256.

The spelling of 6966809 in words is "six million, nine hundred sixty-six thousand, eight hundred nine".