555986 has 4 divisors (see below), whose sum is σ = 833982. Its totient is φ = 277992.

The previous prime is 555967. The next prime is 556007. The reversal of 555986 is 689555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689555 = 5 ⋅137911.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 961 = 745^2 + 31^2 .

It is a pancake number, because a pancake can be divided into 555986 parts by 1054 straight cuts.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555986.

It is an unprimeable number.

555986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138995 + ... + 138998.

2⁵⁵⁵⁹⁸⁶ is an apocalyptic number.

555986 is a deficient number, since it is larger than the sum of its proper divisors (277996).

555986 is a wasteful number, since it uses less digits than its factorization.

555986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277995.

The product of its digits is 54000, while the sum is 38.

The square root of 555986 is about 745.6446875020. The cubic root of 555986 is about 82.2282950091.

The spelling of 555986 in words is "five hundred fifty-five thousand, nine hundred eighty-six".