6447967 has 2 divisors, whose sum is σ = 6447968. Its totient is φ = 6447966.

The previous prime is 6447943. The next prime is 6447983. The reversal of 6447967 is 7697446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6447967 - 2⁷ = 6447839 is a prime.

It is a d-powerful number, because it can be written as 6³ + 4² + 4⁷ + 7⁷ + 9⁷ + 6⁴ + 7⁷ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6447997) 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, 3223983 + 3223984.

It is an arithmetic number, because the mean of its divisors is an integer number (3223984).

Almost surely, 2^6447967 is an apocalyptic number.

6447967 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447967 is an equidigital number, since it uses as much as digits as its factorization.

6447967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 6447967 is about 2539.2847418122. The cubic root of 6447967 is about 186.1262391175.

It can be divided in two parts, 64479 and 67, that added together give a palindrome (64546).

The spelling of 6447967 in words is "six million, four hundred forty-seven thousand, nine hundred sixty-seven".