6591891 has 8 divisors (see below), whose sum is σ = 8976384. Its totient is φ = 4301000.

The previous prime is 6591889. The next prime is 6591899. The reversal of 6591891 is 1981956.

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 6591891 - 2¹ = 6591889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6591899) 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 7 ways as a sum of consecutive naturals, for example, 23235 + ... + 23516.

It is an arithmetic number, because the mean of its divisors is an integer number (1122048).

Almost surely, 2^6591891 is an apocalyptic number.

6591891 is a deficient number, since it is larger than the sum of its proper divisors (2384493).

6591891 is a wasteful number, since it uses less digits than its factorization.

6591891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46801.

The product of its digits is 19440, while the sum is 39.

The square root of 6591891 is about 2567.4678186883. The cubic root of 6591891 is about 187.5008924402.

The spelling of 6591891 in words is "six million, five hundred ninety-one thousand, eight hundred ninety-one".