6865591 has 2 divisors, whose sum is σ = 6865592. Its totient is φ = 6865590.

The previous prime is 6865571. The next prime is 6865597. The reversal of 6865591 is 1955686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6865591 - 2⁵ = 6865559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6865597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432795 + 3432796.

It is an arithmetic number, because the mean of its divisors is an integer number (3432796).

Almost surely, 2^6865591 is an apocalyptic number.

6865591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6865591 is an equidigital number, since it uses as much as digits as its factorization.

6865591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 6865591 is about 2620.2272802183. The cubic root of 6865591 is about 190.0608392426.

The spelling of 6865591 in words is "six million, eight hundred sixty-five thousand, five hundred ninety-one".