986555 has 4 divisors (see below), whose sum is σ = 1183872. Its totient is φ = 789240.

The previous prime is 986543. The next prime is 986563. The reversal of 986555 is 555689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555689 = 43 ⋅12923.

It is not a de Polignac number, because 986555 - 2¹⁰ = 985531 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

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, 98651 + ... + 98660.

It is an arithmetic number, because the mean of its divisors is an integer number (295968).

2⁹⁸⁶⁵⁵⁵ is an apocalyptic number.

986555 is a deficient number, since it is larger than the sum of its proper divisors (197317).

986555 is a wasteful number, since it uses less digits than its factorization.

986555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197316.

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

The square root of 986555 is about 993.2547508067. The cubic root of 986555 is about 99.5498096613.

The spelling of 986555 in words is "nine hundred eighty-six thousand, five hundred fifty-five".