6717647 has 4 divisors (see below), whose sum is σ = 6949320. Its totient is φ = 6485976.

The previous prime is 6717629. The next prime is 6717649. The reversal of 6717647 is 7467176.

It is a happy number.

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 6717647 - 2⁸ = 6717391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6717647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6717649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115793 + ... + 115850.

It is an arithmetic number, because the mean of its divisors is an integer number (1737330).

Almost surely, 2^6717647 is an apocalyptic number.

6717647 is a deficient number, since it is larger than the sum of its proper divisors (231673).

6717647 is a wasteful number, since it uses less digits than its factorization.

6717647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231672.

The product of its digits is 49392, while the sum is 38.

The square root of 6717647 is about 2591.8423948998. The cubic root of 6717647 is about 188.6857313757.

The spelling of 6717647 in words is "six million, seven hundred seventeen thousand, six hundred forty-seven".