550559689 has 4 divisors (see below), whose sum is σ = 550760724. Its totient is φ = 550358656.

The previous prime is 550559663. The next prime is 550559699. The reversal of 550559689 is 986955055.

It is a happy number.

550559689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986955055 = 5 ⋅197391011.

It can be written as a sum of positive squares in 2 ways, for example, as 166203664 + 384356025 = 12892^2 + 19605^2 .

It is a cyclic number.

It is not a de Polignac number, because 550559689 - 2⁵ = 550559657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550559609) 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, 96352 + ... + 101905.

It is an arithmetic number, because the mean of its divisors is an integer number (137690181).

Almost surely, 2^550559689 is an apocalyptic number.

It is an amenable number.

550559689 is a deficient number, since it is larger than the sum of its proper divisors (201035).

550559689 is a wasteful number, since it uses less digits than its factorization.

550559689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201034.

The product of its (nonzero) digits is 2430000, while the sum is 52.

The square root of 550559689 is about 23464.0083745297. The cubic root of 550559689 is about 819.5990946265.

The spelling of 550559689 in words is "five hundred fifty million, five hundred fifty-nine thousand, six hundred eighty-nine".