6722857 has 2 divisors, whose sum is σ = 6722858. Its totient is φ = 6722856.

The previous prime is 6722843. The next prime is 6722861. The reversal of 6722857 is 7582276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6255001 + 467856 = 2501^2 + 684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6722857 is a prime.

It is a d-powerful number, because it can be written as 6⁷ + 7⁵ + 2¹⁴ + 2²² + 8⁷ + 5⁴ + 7⁶ .

It is equal to p₄₅₈₉₈₃ and since 6722857 and 458983 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (6722057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361428 + 3361429.

It is an arithmetic number, because the mean of its divisors is an integer number (3361429).

Almost surely, 2^6722857 is an apocalyptic number.

It is an amenable number.

6722857 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722857 is an equidigital number, since it uses as much as digits as its factorization.

6722857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 6722857 is about 2592.8472766440. The cubic root of 6722857 is about 188.7344983834.

The spelling of 6722857 in words is "six million, seven hundred twenty-two thousand, eight hundred fifty-seven".