6648947 has 4 divisors (see below), whose sum is σ = 6682896. Its totient is φ = 6615000.

The previous prime is 6648883. The next prime is 6648977. The reversal of 6648947 is 7498466.

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 6648947 - 2⁶ = 6648883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6648898 and 6648907.

It is not an unprimeable number, because it can be changed into a prime (6648977) 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, 16679 + ... + 17072.

It is an arithmetic number, because the mean of its divisors is an integer number (1670724).

Almost surely, 2^6648947 is an apocalyptic number.

6648947 is a deficient number, since it is larger than the sum of its proper divisors (33949).

6648947 is a wasteful number, since it uses less digits than its factorization.

6648947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33948.

The product of its digits is 290304, while the sum is 44.

The square root of 6648947 is about 2578.5552156198. Note that the first 3 decimals coincide. The cubic root of 6648947 is about 188.0403093738.

The spelling of 6648947 in words is "six million, six hundred forty-eight thousand, nine hundred forty-seven".