6864986 has 8 divisors (see below), whose sum is σ = 10357524. Its totient is φ = 3412480.

The previous prime is 6864983. The next prime is 6864997. The reversal of 6864986 is 6894686.

It can be written as a sum of positive squares in 2 ways, for example, as 6786025 + 78961 = 2605^2 + 281^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6864986.

It is not an unprimeable number, because it can be changed into a prime (6864983) 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, 9575 + ... + 10266.

Almost surely, 2^6864986 is an apocalyptic number.

6864986 is a deficient number, since it is larger than the sum of its proper divisors (3492538).

6864986 is a wasteful number, since it uses less digits than its factorization.

6864986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20016.

The product of its digits is 497664, while the sum is 47.

The square root of 6864986 is about 2620.1118296745. Note that the first 3 decimals coincide. The cubic root of 6864986 is about 190.0552563202.

The spelling of 6864986 in words is "six million, eight hundred sixty-four thousand, nine hundred eighty-six".