5999986 has 8 divisors (see below), whose sum is σ = 9052524. Its totient is φ = 2982480.

The previous prime is 5999947. The next prime is 5999993. The reversal of 5999986 is 6899995.

It can be written as a sum of positive squares in 2 ways, for example, as 4756761 + 1243225 = 2181^2 + 1115^2 .

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

It is an unprimeable number.

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, 8325 + ... + 9016.

Almost surely, 2^5999986 is an apocalyptic number.

5999986 is a deficient number, since it is larger than the sum of its proper divisors (3052538).

5999986 is a wasteful number, since it uses less digits than its factorization.

5999986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17516.

The product of its digits is 1574640, while the sum is 55.

The square root of 5999986 is about 2449.4868850435. The cubic root of 5999986 is about 181.7119179515.

Subtracting 5999986 from its reverse (6899995), we obtain a palindrome (900009).

It can be divided in two parts, 599 and 9986, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 5999986 in words is "five million, nine hundred ninety-nine thousand, nine hundred eighty-six".