6891371 has 4 divisors (see below), whose sum is σ = 6897600. Its totient is φ = 6885144.

The previous prime is 6891337. The next prime is 6891383. The reversal of 6891371 is 1731986.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1731986 = 2 ⋅865993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6891371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6891971) 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 in 3 ways as a sum of consecutive naturals, for example, 956 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (1724400).

Almost surely, 2^6891371 is an apocalyptic number.

6891371 is a deficient number, since it is larger than the sum of its proper divisors (6229).

6891371 is a wasteful number, since it uses less digits than its factorization.

6891371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228.

The product of its digits is 9072, while the sum is 35.

The square root of 6891371 is about 2625.1420913924. The cubic root of 6891371 is about 190.2984322087.

The spelling of 6891371 in words is "six million, eight hundred ninety-one thousand, three hundred seventy-one".