6986857 has 4 divisors (see below), whose sum is σ = 7071120. Its totient is φ = 6902596.

The previous prime is 6986849. The next prime is 6986869. The reversal of 6986857 is 7586896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6986857 - 2³ = 6986849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6986857.

It is not an unprimeable number, because it can be changed into a prime (6986807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42007 + ... + 42172.

It is an arithmetic number, because the mean of its divisors is an integer number (1767780).

Almost surely, 2^6986857 is an apocalyptic number.

It is an amenable number.

6986857 is a deficient number, since it is larger than the sum of its proper divisors (84263).

6986857 is an equidigital number, since it uses as much as digits as its factorization.

6986857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84262.

The product of its digits is 725760, while the sum is 49.

The square root of 6986857 is about 2643.2663505595. The cubic root of 6986857 is about 191.1733211056.

The spelling of 6986857 in words is "six million, nine hundred eighty-six thousand, eight hundred fifty-seven".