6857709 has 8 divisors (see below), whose sum is σ = 9254112. Its totient is φ = 4516560.

The previous prime is 6857707. The next prime is 6857713. The reversal of 6857709 is 9077586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6857709 - 2¹ = 6857707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857707) 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 7 ways as a sum of consecutive naturals, for example, 13522 + ... + 14019.

It is an arithmetic number, because the mean of its divisors is an integer number (1156764).

Almost surely, 2^6857709 is an apocalyptic number.

It is an amenable number.

6857709 is a deficient number, since it is larger than the sum of its proper divisors (2396403).

6857709 is a wasteful number, since it uses less digits than its factorization.

6857709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27627.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 6857709 is about 2618.7227802881. The cubic root of 6857709 is about 189.9880786611.

The spelling of 6857709 in words is "six million, eight hundred fifty-seven thousand, seven hundred nine".