545543 has 2 divisors, whose sum is σ = 545544. Its totient is φ = 545542.

The previous prime is 545533. The next prime is 545549. The reversal of 545543 is 345545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 545543 - 2⁴ = 545527 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 545543.

It is not a weakly prime, because it can be changed into another prime (545549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272771 + 272772.

It is an arithmetic number, because the mean of its divisors is an integer number (272772).

2⁵⁴⁵⁵⁴³ is an apocalyptic number.

545543 is a deficient number, since it is larger than the sum of its proper divisors (1).

545543 is an equidigital number, since it uses as much as digits as its factorization.

545543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 26.

The square root of 545543 is about 738.6088274588. The cubic root of 545543 is about 81.7102104777.

The spelling of 545543 in words is "five hundred forty-five thousand, five hundred forty-three".