6856931 has 2 divisors, whose sum is σ = 6856932. Its totient is φ = 6856930.

The previous prime is 6856919. The next prime is 6856937. The reversal of 6856931 is 1396586.

6856931 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6856931 - 2¹⁸ = 6594787 is a prime.

It is a super-2 number, since 2×6856931² = 94035005477522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6856937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428465 + 3428466.

It is an arithmetic number, because the mean of its divisors is an integer number (3428466).

Almost surely, 2^6856931 is an apocalyptic number.

6856931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6856931 is an equidigital number, since it uses as much as digits as its factorization.

6856931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 6856931 is about 2618.5742303781. The cubic root of 6856931 is about 189.9808937390.

The spelling of 6856931 in words is "six million, eight hundred fifty-six thousand, nine hundred thirty-one".