6491947 has 16 divisors (see below), whose sum is σ = 8236800. Its totient is φ = 4969440.

The previous prime is 6491929. The next prime is 6491951. The reversal of 6491947 is 7491946.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-6491947 is a prime.

6491947 is a modest number, since divided by 1947 gives 649 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6491047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (514800).

Almost surely, 2^6491947 is an apocalyptic number.

6491947 is a deficient number, since it is larger than the sum of its proper divisors (1744853).

6491947 is a wasteful number, since it uses less digits than its factorization.

6491947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506.

The product of its digits is 54432, while the sum is 40.

The square root of 6491947 is about 2547.9299440919. The cubic root of 6491947 is about 186.5484544202.

Subtracting 6491947 from its reverse (7491946), we obtain a palindrome (999999).

The spelling of 6491947 in words is "six million, four hundred ninety-one thousand, nine hundred forty-seven".