543441989 has 2 divisors, whose sum is σ = 543441990. Its totient is φ = 543441988.

The previous prime is 543441937. The next prime is 543442037. The reversal of 543441989 is 989144345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465825889 + 77616100 = 21583^2 + 8810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543441989 is a prime.

It is a super-2 number, since 2×543441989² = 590658390816552242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543441289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271720994 + 271720995.

It is an arithmetic number, because the mean of its divisors is an integer number (271720995).

Almost surely, 2^543441989 is an apocalyptic number.

It is an amenable number.

543441989 is a deficient number, since it is larger than the sum of its proper divisors (1).

543441989 is an equidigital number, since it uses as much as digits as its factorization.

543441989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 543441989 is about 23311.8422480936. The cubic root of 543441989 is about 816.0518062112.

The spelling of 543441989 in words is "five hundred forty-three million, four hundred forty-one thousand, nine hundred eighty-nine".