6689317 has 2 divisors, whose sum is σ = 6689318. Its totient is φ = 6689316.

The previous prime is 6689303. The next prime is 6689323. The reversal of 6689317 is 7139866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3682561 + 3006756 = 1919^2 + 1734^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689317 - 2¹⁵ = 6656549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6689317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6689327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344658 + 3344659.

It is an arithmetic number, because the mean of its divisors is an integer number (3344659).

Almost surely, 2^6689317 is an apocalyptic number.

It is an amenable number.

6689317 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689317 is an equidigital number, since it uses as much as digits as its factorization.

6689317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 6689317 is about 2586.3713963776. The cubic root of 6689317 is about 188.4201126347.

The spelling of 6689317 in words is "six million, six hundred eighty-nine thousand, three hundred seventeen".