545781589 has 2 divisors, whose sum is σ = 545781590. Its totient is φ = 545781588.

The previous prime is 545781581. The next prime is 545781619. The reversal of 545781589 is 985187545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491508900 + 54272689 = 22170^2 + 7367^2 .

It is a cyclic number.

It is not a de Polignac number, because 545781589 - 2³ = 545781581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545781581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272890794 + 272890795.

It is an arithmetic number, because the mean of its divisors is an integer number (272890795).

Almost surely, 2^545781589 is an apocalyptic number.

It is an amenable number.

545781589 is a deficient number, since it is larger than the sum of its proper divisors (1).

545781589 is an equidigital number, since it uses as much as digits as its factorization.

545781589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016000, while the sum is 52.

The square root of 545781589 is about 23361.9688596659. The cubic root of 545781589 is about 817.2212051722.

The spelling of 545781589 in words is "five hundred forty-five million, seven hundred eighty-one thousand, five hundred eighty-nine".