6840118139 has 4 divisors (see below), whose sum is σ = 6862112400. Its totient is φ = 6818123880.

The previous prime is 6840118127. The next prime is 6840118157. The reversal of 6840118139 is 9318110486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840118139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6840118096 and 6840118105.

It is not an unprimeable number, because it can be changed into a prime (6840118339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10996664 + ... + 10997285.

It is an arithmetic number, because the mean of its divisors is an integer number (1715528100).

Almost surely, 2^6840118139 is an apocalyptic number.

6840118139 is a deficient number, since it is larger than the sum of its proper divisors (21994261).

6840118139 is a wasteful number, since it uses less digits than its factorization.

6840118139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21994260.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 6840118139 is about 82705.0067347800. The cubic root of 6840118139 is about 1898.2549202294.

The spelling of 6840118139 in words is "six billion, eight hundred forty million, one hundred eighteen thousand, one hundred thirty-nine".