6889009 has 2 divisors, whose sum is σ = 6889010. Its totient is φ = 6889008.

The previous prime is 6888997. The next prime is 6889013. The reversal of 6889009 is 9009886.

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., 5832225 + 1056784 = 2415^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 6889009 - 2¹⁷ = 6757937 is a prime.

It is not a weakly prime, because it can be changed into another prime (6889019) 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, 3444504 + 3444505.

It is an arithmetic number, because the mean of its divisors is an integer number (3444505).

Almost surely, 2^6889009 is an apocalyptic number.

It is an amenable number.

6889009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6889009 is an equidigital number, since it uses as much as digits as its factorization.

6889009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 6889009 is about 2624.6921724271. The cubic root of 6889009 is about 190.2766882887.

It can be divided in two parts, 688900 and 9, that multiplied together give a square (6200100 = 2490²).

The spelling of 6889009 in words is "six million, eight hundred eighty-nine thousand, nine".