6894391 has 4 divisors (see below), whose sum is σ = 7879312. Its totient is φ = 5909472.

The previous prime is 6894343. The next prime is 6894421. The reversal of 6894391 is 1934986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1934986 = 2 ⋅967493.

It is a cyclic number.

It is not a de Polignac number, because 6894391 - 2⁷ = 6894263 is a prime.

6894391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6894301) 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, 492450 + ... + 492463.

It is an arithmetic number, because the mean of its divisors is an integer number (1969828).

Almost surely, 2^6894391 is an apocalyptic number.

6894391 is a deficient number, since it is larger than the sum of its proper divisors (984921).

6894391 is an equidigital number, since it uses as much as digits as its factorization.

6894391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984920.

The product of its digits is 46656, while the sum is 40.

The square root of 6894391 is about 2625.7172353473. The cubic root of 6894391 is about 190.3262262590.

The spelling of 6894391 in words is "six million, eight hundred ninety-four thousand, three hundred ninety-one".