6722549 has 2 divisors, whose sum is σ = 6722550. Its totient is φ = 6722548.

The previous prime is 6722539. The next prime is 6722557. The reversal of 6722549 is 9452276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 117649 = 2570^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 6722549 - 2²⁰ = 5673973 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 6⁴ + 7⁷ + 2¹⁶ + 2²⁰ + 5⁴ + 4 + 9⁷ .

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6722539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361274 + 3361275.

It is an arithmetic number, because the mean of its divisors is an integer number (3361275).

Almost surely, 2^6722549 is an apocalyptic number.

It is an amenable number.

6722549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722549 is an equidigital number, since it uses as much as digits as its factorization.

6722549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 6722549 is about 2592.7878817983. The cubic root of 6722549 is about 188.7316161210.

The spelling of 6722549 in words is "six million, seven hundred twenty-two thousand, five hundred forty-nine".