545420189 has 2 divisors, whose sum is σ = 545420190. Its totient is φ = 545420188.

The previous prime is 545420179. The next prime is 545420221. The reversal of 545420189 is 981024545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523723225 + 21696964 = 22885^2 + 4658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545420189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545420149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272710094 + 272710095.

It is an arithmetic number, because the mean of its divisors is an integer number (272710095).

Almost surely, 2^545420189 is an apocalyptic number.

It is an amenable number.

545420189 is a deficient number, since it is larger than the sum of its proper divisors (1).

545420189 is an equidigital number, since it uses as much as digits as its factorization.

545420189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 545420189 is about 23354.2327855145. The cubic root of 545420189 is about 817.0407856523.

The spelling of 545420189 in words is "five hundred forty-five million, four hundred twenty thousand, one hundred eighty-nine".