6443963 has 2 divisors, whose sum is σ = 6443964. Its totient is φ = 6443962.

The previous prime is 6443959. The next prime is 6443977. The reversal of 6443963 is 3693446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6443963 - 2² = 6443959 is a prime.

It is not a weakly prime, because it can be changed into another prime (6443903) 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, 3221981 + 3221982.

It is an arithmetic number, because the mean of its divisors is an integer number (3221982).

Almost surely, 2^6443963 is an apocalyptic number.

6443963 is a deficient number, since it is larger than the sum of its proper divisors (1).

6443963 is an equidigital number, since it uses as much as digits as its factorization.

6443963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 35.

The square root of 6443963 is about 2538.4962083880. The cubic root of 6443963 is about 186.0877048128.

The spelling of 6443963 in words is "six million, four hundred forty-three thousand, nine hundred sixty-three".