6722449 has 4 divisors (see below), whose sum is σ = 6728164. Its totient is φ = 6716736.

The previous prime is 6722423. The next prime is 6722473. The reversal of 6722449 is 9442276.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 3940225 = 1668^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 6722449 - 2⁷ = 6722321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6722479) 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 in 3 ways as a sum of consecutive naturals, for example, 372 + ... + 3685.

It is an arithmetic number, because the mean of its divisors is an integer number (1682041).

Almost surely, 2^6722449 is an apocalyptic number.

It is an amenable number.

6722449 is a deficient number, since it is larger than the sum of its proper divisors (5715).

6722449 is a wasteful number, since it uses less digits than its factorization.

6722449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714.

The product of its digits is 24192, while the sum is 34.

The square root of 6722449 is about 2592.7685974649. The cubic root of 6722449 is about 188.7306803026.

The spelling of 6722449 in words is "six million, seven hundred twenty-two thousand, four hundred forty-nine".