543343993 has 2 divisors, whose sum is σ = 543343994. Its totient is φ = 543343992.

The previous prime is 543343991. The next prime is 543344027. The reversal of 543343993 is 399343345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524089449 + 19254544 = 22893^2 + 4388^2 .

It is a cyclic number.

It is not a de Polignac number, because 543343993 - 2¹ = 543343991 is a prime.

It is a super-3 number, since 3×543343993³ (a number of 27 digits) contains 333 as substring.

Together with 543343991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (543343991) 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, 271671996 + 271671997.

It is an arithmetic number, because the mean of its divisors is an integer number (271671997).

Almost surely, 2^543343993 is an apocalyptic number.

It is an amenable number.

543343993 is a deficient number, since it is larger than the sum of its proper divisors (1).

543343993 is an equidigital number, since it uses as much as digits as its factorization.

543343993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 43.

The square root of 543343993 is about 23309.7403031437. The cubic root of 543343993 is about 816.0027518370.

The spelling of 543343993 in words is "five hundred forty-three million, three hundred forty-three thousand, nine hundred ninety-three".