6491671 has 8 divisors (see below), whose sum is σ = 6969024. Its totient is φ = 6024960.

The previous prime is 6491669. The next prime is 6491677. The reversal of 6491671 is 1761946.

6491671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6491671 - 2¹ = 6491669 is a prime.

It is a Duffinian number.

6491671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491677) 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 7 ways as a sum of consecutive naturals, for example, 1375 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (871128).

Almost surely, 2^6491671 is an apocalyptic number.

6491671 is a deficient number, since it is larger than the sum of its proper divisors (477353).

6491671 is a wasteful number, since it uses less digits than its factorization.

6491671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5321.

The product of its digits is 9072, while the sum is 34.

The square root of 6491671 is about 2547.8757819015. The cubic root of 6491671 is about 186.5458107294.

The spelling of 6491671 in words is "six million, four hundred ninety-one thousand, six hundred seventy-one".