6840536869 has 2 divisors, whose sum is σ = 6840536870. Its totient is φ = 6840536868.

The previous prime is 6840536867. The next prime is 6840536887. The reversal of 6840536869 is 9686350486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4067250625 + 2773286244 = 63775^2 + 52662^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840536869 - 2¹ = 6840536867 is a prime.

It is a super-2 number, since 2×6840536869² = 93585889312296646322, which contains 22 as substring.

Together with 6840536867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840536863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420268434 + 3420268435.

It is an arithmetic number, because the mean of its divisors is an integer number (3420268435).

Almost surely, 2^6840536869 is an apocalyptic number.

It is an amenable number.

6840536869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840536869 is an equidigital number, since it uses as much as digits as its factorization.

6840536869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The square root of 6840536869 is about 82707.5381630961. The cubic root of 6840536869 is about 1898.2936544563.

The spelling of 6840536869 in words is "six billion, eight hundred forty million, five hundred thirty-six thousand, eight hundred sixty-nine".