6722717 has 2 divisors, whose sum is σ = 6722718. Its totient is φ = 6722716.

The previous prime is 6722689. The next prime is 6722719. The reversal of 6722717 is 7172276.

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., 6220036 + 502681 = 2494^2 + 709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6722717 is a prime.

Together with 6722719, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6722719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361358 + 3361359.

It is an arithmetic number, because the mean of its divisors is an integer number (3361359).

Almost surely, 2^6722717 is an apocalyptic number.

It is an amenable number.

6722717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722717 is an equidigital number, since it uses as much as digits as its factorization.

6722717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8232, while the sum is 32.

The square root of 6722717 is about 2592.8202791555. The cubic root of 6722717 is about 188.7331882750.

The spelling of 6722717 in words is "six million, seven hundred twenty-two thousand, seven hundred seventeen".