5618986 has 4 divisors (see below), whose sum is σ = 8428482. Its totient is φ = 2809492.

The previous prime is 5618981. The next prime is 5619001. The reversal of 5618986 is 6898165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6898165 = 5 ⋅1379633.

It can be written as a sum of positive squares in only one way, i.e., 5202961 + 416025 = 2281^2 + 645^2 .

It is not an unprimeable number, because it can be changed into a prime (5618981) 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 as a sum of consecutive naturals, namely, 1404745 + ... + 1404748.

Almost surely, 2^5618986 is an apocalyptic number.

5618986 is a deficient number, since it is larger than the sum of its proper divisors (2809496).

5618986 is a wasteful number, since it uses less digits than its factorization.

5618986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809495.

The product of its digits is 103680, while the sum is 43.

The square root of 5618986 is about 2370.4400435362. The cubic root of 5618986 is about 177.7812614190.

The spelling of 5618986 in words is "five million, six hundred eighteen thousand, nine hundred eighty-six".