6853939913 has 4 divisors (see below), whose sum is σ = 6983259588. Its totient is φ = 6724620240.

The previous prime is 6853939889. The next prime is 6853939933. The reversal of 6853939913 is 3199393586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3272755264 + 3581184649 = 57208^2 + 59843^2 .

It is a cyclic number.

It is not a de Polignac number, because 6853939913 - 2⁶ = 6853939849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6853939933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64659758 + ... + 64659863.

It is an arithmetic number, because the mean of its divisors is an integer number (1745814897).

Almost surely, 2^6853939913 is an apocalyptic number.

It is an amenable number.

6853939913 is a deficient number, since it is larger than the sum of its proper divisors (129319675).

6853939913 is a wasteful number, since it uses less digits than its factorization.

6853939913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129319674.

The product of its digits is 4723920, while the sum is 56.

The square root of 6853939913 is about 82788.5252495779. The cubic root of 6853939913 is about 1899.5326563402.

The spelling of 6853939913 in words is "six billion, eight hundred fifty-three million, nine hundred thirty-nine thousand, nine hundred thirteen".