543997 has 2 divisors, whose sum is σ = 543998. Its totient is φ = 543996.

The previous prime is 543971. The next prime is 544001. The reversal of 543997 is 799345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427716 + 116281 = 654^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 543997 - 2¹⁹ = 19709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543967) 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, 271998 + 271999.

It is an arithmetic number, because the mean of its divisors is an integer number (271999).

2⁵⁴³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

543997 is a deficient number, since it is larger than the sum of its proper divisors (1).

543997 is an equidigital number, since it uses as much as digits as its factorization.

543997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 543997 is about 737.5615228576. The cubic root of 543997 is about 81.6329519772.

It can be divided in two parts, 543 and 997, that added together give a triangular number (1540 = T₅₅).

The spelling of 543997 in words is "five hundred forty-three thousand, nine hundred ninety-seven".