6518791 has 2 divisors, whose sum is σ = 6518792. Its totient is φ = 6518790.

The previous prime is 6518789. The next prime is 6518801. The reversal of 6518791 is 1978156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6518791 - 2¹ = 6518789 is a prime.

It is a super-2 number, since 2×6518791² = 84989272203362, which contains 22 as substring.

Together with 6518789, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6518791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6518731) 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 as a sum of consecutive naturals, namely, 3259395 + 3259396.

It is an arithmetic number, because the mean of its divisors is an integer number (3259396).

Almost surely, 2^6518791 is an apocalyptic number.

6518791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6518791 is an equidigital number, since it uses as much as digits as its factorization.

6518791 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6518791 is about 2553.1923155141. The cubic root of 6518791 is about 186.8052248614.

The spelling of 6518791 in words is "six million, five hundred eighteen thousand, seven hundred ninety-one".