6818197 has 2 divisors, whose sum is σ = 6818198. Its totient is φ = 6818196.

The previous prime is 6818191. The next prime is 6818221. The reversal of 6818197 is 7918186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6625476 + 192721 = 2574^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 6818197 - 2⁷ = 6818069 is a prime.

It is a Chen prime.

6818197 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6818191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409098 + 3409099.

It is an arithmetic number, because the mean of its divisors is an integer number (3409099).

Almost surely, 2^6818197 is an apocalyptic number.

It is an amenable number.

6818197 is a deficient number, since it is larger than the sum of its proper divisors (1).

6818197 is an equidigital number, since it uses as much as digits as its factorization.

6818197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 6818197 is about 2611.1677464307. The cubic root of 6818197 is about 189.6224914270.

The spelling of 6818197 in words is "six million, eight hundred eighteen thousand, one hundred ninety-seven".