6447443 has 2 divisors, whose sum is σ = 6447444. Its totient is φ = 6447442.

The previous prime is 6447421. The next prime is 6447449. The reversal of 6447443 is 3447446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6447443 - 2⁸ = 6447187 is a prime.

It is not a weakly prime, because it can be changed into another prime (6447449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223721 + 3223722.

It is an arithmetic number, because the mean of its divisors is an integer number (3223722).

Almost surely, 2^6447443 is an apocalyptic number.

6447443 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447443 is an equidigital number, since it uses as much as digits as its factorization.

6447443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 32.

The square root of 6447443 is about 2539.1815610547. The cubic root of 6447443 is about 186.1211970739.

The spelling of 6447443 in words is "six million, four hundred forty-seven thousand, four hundred forty-three".