550538389 has 2 divisors, whose sum is σ = 550538390. Its totient is φ = 550538388.

The previous prime is 550538377. The next prime is 550538413. The reversal of 550538389 is 983835055.

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., 288422289 + 262116100 = 16983^2 + 16190^2 .

It is a cyclic number.

It is not a de Polignac number, because 550538389 - 2²⁷ = 416320661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550538309) 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 as a sum of consecutive naturals, namely, 275269194 + 275269195.

It is an arithmetic number, because the mean of its divisors is an integer number (275269195).

Almost surely, 2^550538389 is an apocalyptic number.

It is an amenable number.

550538389 is a deficient number, since it is larger than the sum of its proper divisors (1).

550538389 is an equidigital number, since it uses as much as digits as its factorization.

550538389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 550538389 is about 23463.5544834963. The cubic root of 550538389 is about 819.5885249667.

The spelling of 550538389 in words is "five hundred fifty million, five hundred thirty-eight thousand, three hundred eighty-nine".