6997817 has 2 divisors, whose sum is σ = 6997818. Its totient is φ = 6997816.

The previous prime is 6997807. The next prime is 6997841. The reversal of 6997817 is 7187996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5707321 + 1290496 = 2389^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997817 - 2¹⁴ = 6981433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6997807) 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, 3498908 + 3498909.

It is an arithmetic number, because the mean of its divisors is an integer number (3498909).

Almost surely, 2^6997817 is an apocalyptic number.

It is an amenable number.

6997817 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997817 is an equidigital number, since it uses as much as digits as its factorization.

6997817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 47.

The square root of 6997817 is about 2645.3387306733. The cubic root of 6997817 is about 191.2732308346.

The spelling of 6997817 in words is "six million, nine hundred ninety-seven thousand, eight hundred seventeen".