6889591 has 4 divisors (see below), whose sum is σ = 6903792. Its totient is φ = 6875392.

The previous prime is 6889549. The next prime is 6889613. The reversal of 6889591 is 1959886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6889591 - 2⁹ = 6889079 is a prime.

It is a Duffinian number.

6889591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6889541) 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, 6346 + ... + 7351.

It is an arithmetic number, because the mean of its divisors is an integer number (1725948).

Almost surely, 2^6889591 is an apocalyptic number.

6889591 is a deficient number, since it is larger than the sum of its proper divisors (14201).

6889591 is a wasteful number, since it uses less digits than its factorization.

6889591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200.

The product of its digits is 155520, while the sum is 46.

The square root of 6889591 is about 2624.8030402299. The cubic root of 6889591 is about 190.2820464814.

It can be divided in two parts, 68895 and 91, that added together give a palindrome (68986).

The spelling of 6889591 in words is "six million, eight hundred eighty-nine thousand, five hundred ninety-one".