6644047 has 2 divisors, whose sum is σ = 6644048. Its totient is φ = 6644046.

The previous prime is 6644023. The next prime is 6644069. The reversal of 6644047 is 7404466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6644047 - 2⁷ = 6643919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322023 + 3322024.

It is an arithmetic number, because the mean of its divisors is an integer number (3322024).

Almost surely, 2^6644047 is an apocalyptic number.

6644047 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644047 is an equidigital number, since it uses as much as digits as its factorization.

6644047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 6644047 is about 2577.6048960227. The cubic root of 6644047 is about 187.9941053682.

The spelling of 6644047 in words is "six million, six hundred forty-four thousand, forty-seven".