6857679 has 4 divisors (see below), whose sum is σ = 9143576. Its totient is φ = 4571784.

The previous prime is 6857671. The next prime is 6857687. The reversal of 6857679 is 9767586.

6857679 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (6857671) and next prime (6857687).

It is not a de Polignac number, because 6857679 - 2³ = 6857671 is a prime.

It is a super-2 number, since 2×6857679² = 94055522534082, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857671) 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 in 3 ways as a sum of consecutive naturals, for example, 1142944 + ... + 1142949.

It is an arithmetic number, because the mean of its divisors is an integer number (2285894).

Almost surely, 2^6857679 is an apocalyptic number.

6857679 is a deficient number, since it is larger than the sum of its proper divisors (2285897).

6857679 is a wasteful number, since it uses less digits than its factorization.

6857679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285896.

The product of its digits is 635040, while the sum is 48.

The square root of 6857679 is about 2618.7170522987. The cubic root of 6857679 is about 189.9878016176.

The spelling of 6857679 in words is "six million, eight hundred fifty-seven thousand, six hundred seventy-nine".