6856547339 has 4 divisors (see below), whose sum is σ = 6859912080. Its totient is φ = 6853182600.

The previous prime is 6856547333. The next prime is 6856547351. The reversal of 6856547339 is 9337456586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9337456586 = 2 ⋅4668728293.

It is a cyclic number.

It is not a de Polignac number, because 6856547339 - 2⁴ = 6856547323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6856547333) 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, 1679312 + ... + 1683389.

It is an arithmetic number, because the mean of its divisors is an integer number (1714978020).

Almost surely, 2^6856547339 is an apocalyptic number.

6856547339 is a deficient number, since it is larger than the sum of its proper divisors (3364741).

6856547339 is a wasteful number, since it uses less digits than its factorization.

6856547339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364740.

The product of its digits is 16329600, while the sum is 56.

The square root of 6856547339 is about 82804.2712606059. The cubic root of 6856547339 is about 1899.7735038411.

The spelling of 6856547339 in words is "six billion, eight hundred fifty-six million, five hundred forty-seven thousand, three hundred thirty-nine".