6647347 has 4 divisors (see below), whose sum is σ = 7596976. Its totient is φ = 5697720.

The previous prime is 6647339. The next prime is 6647363. The reversal of 6647347 is 7437466.

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

It is not a de Polignac number, because 6647347 - 2³ = 6647339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647317) 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, 474804 + ... + 474817.

It is an arithmetic number, because the mean of its divisors is an integer number (1899244).

Almost surely, 2^6647347 is an apocalyptic number.

6647347 is a deficient number, since it is larger than the sum of its proper divisors (949629).

6647347 is an equidigital number, since it uses as much as digits as its factorization.

6647347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949628.

The product of its digits is 84672, while the sum is 37.

The square root of 6647347 is about 2578.2449456946. The cubic root of 6647347 is about 188.0252248483.

The spelling of 6647347 in words is "six million, six hundred forty-seven thousand, three hundred forty-seven".