6722689 has 2 divisors, whose sum is σ = 6722690. Its totient is φ = 6722688.

The previous prime is 6722687. The next prime is 6722717. The reversal of 6722689 is 9862276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6718464 + 4225 = 2592^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 6722689 - 2¹ = 6722687 is a prime.

Together with 6722687, it forms a pair of twin primes.

It is equal to p₄₅₈₉₆₈ and since 6722689 and 458968 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6722687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361344 + 3361345.

It is an arithmetic number, because the mean of its divisors is an integer number (3361345).

Almost surely, 2^6722689 is an apocalyptic number.

It is an amenable number.

6722689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722689 is an equidigital number, since it uses as much as digits as its factorization.

6722689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 6722689 is about 2592.8148796241. The cubic root of 6722689 is about 188.7329262512.

The spelling of 6722689 in words is "six million, seven hundred twenty-two thousand, six hundred eighty-nine".