6983891 has 4 divisors (see below), whose sum is σ = 6989400. Its totient is φ = 6978384.

The previous prime is 6983843. The next prime is 6983947. The reversal of 6983891 is 1983896.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6983891 - 2¹⁸ = 6721747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6986891) 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 3 ways as a sum of consecutive naturals, for example, 215 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (1747350).

Almost surely, 2^6983891 is an apocalyptic number.

6983891 is a deficient number, since it is larger than the sum of its proper divisors (5509).

6983891 is a wasteful number, since it uses less digits than its factorization.

6983891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508.

The product of its digits is 93312, while the sum is 44.

The square root of 6983891 is about 2642.7052427390. The cubic root of 6983891 is about 191.1462655294.

The spelling of 6983891 in words is "six million, nine hundred eighty-three thousand, eight hundred ninety-one".