6443950867 has 2 divisors, whose sum is σ = 6443950868. Its totient is φ = 6443950866.

The previous prime is 6443950831. The next prime is 6443950949. The reversal of 6443950867 is 7680593446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6443950867 - 2⁷ = 6443950739 is a prime.

It is not a weakly prime, because it can be changed into another prime (6443950817) 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, 3221975433 + 3221975434.

It is an arithmetic number, because the mean of its divisors is an integer number (3221975434).

Almost surely, 2^6443950867 is an apocalyptic number.

6443950867 is a deficient number, since it is larger than the sum of its proper divisors (1).

6443950867 is an equidigital number, since it uses as much as digits as its factorization.

6443950867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The square root of 6443950867 is about 80274.2229299045. Note that the first 3 decimals coincide. The cubic root of 6443950867 is about 1860.8758802117.

The spelling of 6443950867 in words is "six billion, four hundred forty-three million, nine hundred fifty thousand, eight hundred sixty-seven".