6444443 has 2 divisors, whose sum is σ = 6444444. Its totient is φ = 6444442.

The previous prime is 6444437. The next prime is 6444481. The reversal of 6444443 is 3444446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6444443 - 2¹⁶ = 6378907 is a prime.

It is an Ulam number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (6444413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222221 + 3222222.

It is an arithmetic number, because the mean of its divisors is an integer number (3222222).

Almost surely, 2^6444443 is an apocalyptic number.

6444443 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444443 is an equidigital number, since it uses as much as digits as its factorization.

6444443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 29.

The square root of 6444443 is about 2538.5907507907. The cubic root of 6444443 is about 186.0923251518.

Adding to 6444443 its reverse (3444446), we get a palindrome (9888889).

The spelling of 6444443 in words is "six million, four hundred forty-four thousand, four hundred forty-three".