550387 has 4 divisors (see below), whose sum is σ = 552096. Its totient is φ = 548680.

The previous prime is 550379. The next prime is 550427. The reversal of 550387 is 783055.

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 550387 - 2³ = 550379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550337) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 208 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (138024).

2⁵⁵⁰³⁸⁷ is an apocalyptic number.

550387 is a deficient number, since it is larger than the sum of its proper divisors (1709).

550387 is a wasteful number, since it uses less digits than its factorization.

550387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 550387 is about 741.8807181751. The cubic root of 550387 is about 81.9513393626.

The spelling of 550387 in words is "five hundred fifty thousand, three hundred eighty-seven".