6671947 has 2 divisors, whose sum is σ = 6671948. Its totient is φ = 6671946.

The previous prime is 6671921. The next prime is 6671957. The reversal of 6671947 is 7491766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6671947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6671957) 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 as a sum of consecutive naturals, namely, 3335973 + 3335974.

It is an arithmetic number, because the mean of its divisors is an integer number (3335974).

Almost surely, 2^6671947 is an apocalyptic number.

6671947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6671947 is an equidigital number, since it uses as much as digits as its factorization.

6671947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 6671947 is about 2583.0112272307. The cubic root of 6671947 is about 188.2568825021.

It can be divided in two parts, 66719 and 47, that added together give a palindrome (66766).

The spelling of 6671947 in words is "six million, six hundred seventy-one thousand, nine hundred forty-seven".