6647047 has 4 divisors (see below), whose sum is σ = 7251336. Its totient is φ = 6042760.

The previous prime is 6647041. The next prime is 6647059. The reversal of 6647047 is 7407466.

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 6647047 - 2⁷ = 6646919 is a prime.

It is a Duffinian number.

6647047 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302128 + ... + 302149.

It is an arithmetic number, because the mean of its divisors is an integer number (1812834).

Almost surely, 2^6647047 is an apocalyptic number.

6647047 is a deficient number, since it is larger than the sum of its proper divisors (604289).

6647047 is a wasteful number, since it uses less digits than its factorization.

6647047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604288.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 6647047 is about 2578.1867659268. The cubic root of 6647047 is about 188.0223962303.

The spelling of 6647047 in words is "six million, six hundred forty-seven thousand, forty-seven".