550609 has 2 divisors, whose sum is σ = 550610. Its totient is φ = 550608.

The previous prime is 550607. The next prime is 550621. The reversal of 550609 is 906055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462400 + 88209 = 680^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 550609 - 2¹ = 550607 is a prime.

Together with 550607, it forms a pair of twin primes.

It is equal to p₄₅₃₆₇ and since 550609 and 45367 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (550607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275304 + 275305.

It is an arithmetic number, because the mean of its divisors is an integer number (275305).

2⁵⁵⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

550609 is a deficient number, since it is larger than the sum of its proper divisors (1).

550609 is an equidigital number, since it uses as much as digits as its factorization.

550609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 550609 is about 742.0303228305. The cubic root of 550609 is about 81.9623563087.

The spelling of 550609 in words is "five hundred fifty thousand, six hundred nine".