6856403 has 2 divisors, whose sum is σ = 6856404. Its totient is φ = 6856402.

The previous prime is 6856391. The next prime is 6856411. The reversal of 6856403 is 3046586.

6856403 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 6856403 - 2⁴ = 6856387 is a prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 6856403.

It is not a weakly prime, because it can be changed into another prime (6856463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428201 + 3428202.

It is an arithmetic number, because the mean of its divisors is an integer number (3428202).

Almost surely, 2^6856403 is an apocalyptic number.

6856403 is a deficient number, since it is larger than the sum of its proper divisors (1).

6856403 is an equidigital number, since it uses as much as digits as its factorization.

6856403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6856403 is about 2618.4734102144. The cubic root of 6856403 is about 189.9760172869.

The spelling of 6856403 in words is "six million, eight hundred fifty-six thousand, four hundred three".