6447867 has 4 divisors (see below), whose sum is σ = 8597160. Its totient is φ = 4298576.

The previous prime is 6447853. The next prime is 6447899. The reversal of 6447867 is 7687446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6447867 - 2¹⁴ = 6431483 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6447817) 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 in 3 ways as a sum of consecutive naturals, for example, 1074642 + ... + 1074647.

It is an arithmetic number, because the mean of its divisors is an integer number (2149290).

Almost surely, 2^6447867 is an apocalyptic number.

6447867 is a deficient number, since it is larger than the sum of its proper divisors (2149293).

6447867 is a wasteful number, since it uses less digits than its factorization.

6447867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149292.

The product of its digits is 225792, while the sum is 42.

The square root of 6447867 is about 2539.2650511516. The cubic root of 6447867 is about 186.1252769165.

The spelling of 6447867 in words is "six million, four hundred forty-seven thousand, eight hundred sixty-seven".