6840536887 has 2 divisors, whose sum is σ = 6840536888. Its totient is φ = 6840536886.

The previous prime is 6840536869. The next prime is 6840536917. The reversal of 6840536887 is 7886350486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6840536887 - 2¹¹ = 6840534839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840536867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420268443 + 3420268444.

It is an arithmetic number, because the mean of its divisors is an integer number (3420268444).

Almost surely, 2^6840536887 is an apocalyptic number.

6840536887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840536887 is an equidigital number, since it uses as much as digits as its factorization.

6840536887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The square root of 6840536887 is about 82707.5382719133. The cubic root of 6840536887 is about 1898.2936561214.

The spelling of 6840536887 in words is "six billion, eight hundred forty million, five hundred thirty-six thousand, eight hundred eighty-seven".