6544427 has 2 divisors, whose sum is σ = 6544428. Its totient is φ = 6544426.

The previous prime is 6544423. The next prime is 6544429. The reversal of 6544427 is 7244456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6544427 - 2² = 6544423 is a prime.

Together with 6544429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6544393 and 6544402.

It is not a weakly prime, because it can be changed into another prime (6544423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272213 + 3272214.

It is an arithmetic number, because the mean of its divisors is an integer number (3272214).

Almost surely, 2^6544427 is an apocalyptic number.

6544427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544427 is an equidigital number, since it uses as much as digits as its factorization.

6544427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 6544427 is about 2558.2077710772. The cubic root of 6544427 is about 187.0497832319.

The spelling of 6544427 in words is "six million, five hundred forty-four thousand, four hundred twenty-seven".