6857387 has 2 divisors, whose sum is σ = 6857388. Its totient is φ = 6857386.

The previous prime is 6857359. The next prime is 6857407. The reversal of 6857387 is 7837586.

6857387 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 6857387 - 2¹⁸ = 6595243 is a prime.

It is not a weakly prime, because it can be changed into another prime (6857317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428693 + 3428694.

It is an arithmetic number, because the mean of its divisors is an integer number (3428694).

Almost surely, 2^6857387 is an apocalyptic number.

6857387 is a deficient number, since it is larger than the sum of its proper divisors (1).

6857387 is an equidigital number, since it uses as much as digits as its factorization.

6857387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The square root of 6857387 is about 2618.6612992138. The cubic root of 6857387 is about 189.9851050189.

The spelling of 6857387 in words is "six million, eight hundred fifty-seven thousand, three hundred eighty-seven".