543445109 has 2 divisors, whose sum is σ = 543445110. Its totient is φ = 543445108.

The previous prime is 543445099. The next prime is 543445121. The reversal of 543445109 is 901544345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444999025 + 98446084 = 21095^2 + 9922^2 .

It is a cyclic number.

It is not a de Polignac number, because 543445109 - 2¹² = 543441013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_28519406 and since 543445109 and 28519406 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543445129) 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, 271722554 + 271722555.

It is an arithmetic number, because the mean of its divisors is an integer number (271722555).

Almost surely, 2^543445109 is an apocalyptic number.

It is an amenable number.

543445109 is a deficient number, since it is larger than the sum of its proper divisors (1).

543445109 is an equidigital number, since it uses as much as digits as its factorization.

543445109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 543445109 is about 23311.9091667757. The cubic root of 543445109 is about 816.0533679092.

The spelling of 543445109 in words is "five hundred forty-three million, four hundred forty-five thousand, one hundred nine".