6717891 has 8 divisors (see below), whose sum is σ = 9175824. Its totient is φ = 4369280.

The previous prime is 6717881. The next prime is 6717899. The reversal of 6717891 is 1987176.

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 6717891 - 2⁵ = 6717859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6717899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27186 + ... + 27431.

It is an arithmetic number, because the mean of its divisors is an integer number (1146978).

Almost surely, 2^6717891 is an apocalyptic number.

6717891 is a deficient number, since it is larger than the sum of its proper divisors (2457933).

6717891 is a wasteful number, since it uses less digits than its factorization.

6717891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54661.

The product of its digits is 21168, while the sum is 39.

The square root of 6717891 is about 2591.8894652357. The cubic root of 6717891 is about 188.6880158443.

The spelling of 6717891 in words is "six million, seven hundred seventeen thousand, eight hundred ninety-one".