6811597 has 4 divisors (see below), whose sum is σ = 7335580. Its totient is φ = 6287616.

The previous prime is 6811591. The next prime is 6811601. The reversal of 6811597 is 7951186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7951186 = 2 ⋅3975593.

It can be written as a sum of positive squares in 2 ways, for example, as 2604996 + 4206601 = 1614^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 6811597 - 2¹¹ = 6809549 is a prime.

It is a Duffinian number.

6811597 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261972 + ... + 261997.

It is an arithmetic number, because the mean of its divisors is an integer number (1833895).

Almost surely, 2^6811597 is an apocalyptic number.

It is an amenable number.

6811597 is a deficient number, since it is larger than the sum of its proper divisors (523983).

6811597 is a wasteful number, since it uses less digits than its factorization.

6811597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523982.

The product of its digits is 15120, while the sum is 37.

The square root of 6811597 is about 2609.9036380679. The cubic root of 6811597 is about 189.5612869532.

It can be divided in two parts, 681 and 1597, that added together give a triangular number (2278 = T₆₇).

The spelling of 6811597 in words is "six million, eight hundred eleven thousand, five hundred ninety-seven".