550987 has 4 divisors (see below), whose sum is σ = 583416. Its totient is φ = 518560.

The previous prime is 550973. The next prime is 550993. The reversal of 550987 is 789055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 550987 - 2⁷ = 550859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550937) 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, 16189 + ... + 16222.

It is an arithmetic number, because the mean of its divisors is an integer number (145854).

2⁵⁵⁰⁹⁸⁷ is an apocalyptic number.

550987 is a deficient number, since it is larger than the sum of its proper divisors (32429).

550987 is a wasteful number, since it uses less digits than its factorization.

550987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32428.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 550987 is about 742.2849857029. The cubic root of 550987 is about 81.9811080809.

The spelling of 550987 in words is "five hundred fifty thousand, nine hundred eighty-seven".