6857987 has 8 divisors (see below), whose sum is σ = 7458336. Its totient is φ = 6279552.

The previous prime is 6857971. The next prime is 6857999. The reversal of 6857987 is 7897586.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6857987 - 2⁴ = 6857971 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (6857927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4823 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (932292).

Almost surely, 2^6857987 is an apocalyptic number.

6857987 is a deficient number, since it is larger than the sum of its proper divisors (600349).

6857987 is a wasteful number, since it uses less digits than its factorization.

6857987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957.

The product of its digits is 846720, while the sum is 50.

The square root of 6857987 is about 2618.7758590609. The cubic root of 6857987 is about 189.9906458922.

The spelling of 6857987 in words is "six million, eight hundred fifty-seven thousand, nine hundred eighty-seven".