6839718149 has 4 divisors (see below), whose sum is σ = 7461510720. Its totient is φ = 6217925580.

The previous prime is 6839718101. The next prime is 6839718181. The reversal of 6839718149 is 9418179386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6839718149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6839718094 and 6839718103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839718199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310896269 + ... + 310896290.

It is an arithmetic number, because the mean of its divisors is an integer number (1865377680).

Almost surely, 2^6839718149 is an apocalyptic number.

It is an amenable number.

6839718149 is a deficient number, since it is larger than the sum of its proper divisors (621792571).

6839718149 is a wasteful number, since it uses less digits than its factorization.

6839718149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621792570.

The product of its digits is 2612736, while the sum is 56.

The square root of 6839718149 is about 82702.5885265993. The cubic root of 6839718149 is about 1898.2179180524.

The spelling of 6839718149 in words is "six billion, eight hundred thirty-nine million, seven hundred eighteen thousand, one hundred forty-nine".