6718997 has 2 divisors, whose sum is σ = 6718998. Its totient is φ = 6718996.

The previous prime is 6718963. The next prime is 6719003. The reversal of 6718997 is 7998176.

6718997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5340721 + 1378276 = 2311^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 6718997 - 2⁸ = 6718741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6718937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359498 + 3359499.

It is an arithmetic number, because the mean of its divisors is an integer number (3359499).

Almost surely, 2^6718997 is an apocalyptic number.

It is an amenable number.

6718997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6718997 is an equidigital number, since it uses as much as digits as its factorization.

6718997 is an evil number, because the sum of its binary digits is even.

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

The square root of 6718997 is about 2592.1028143189. The cubic root of 6718997 is about 188.6983701601.

The spelling of 6718997 in words is "six million, seven hundred eighteen thousand, nine hundred ninety-seven".