523543 has 2 divisors, whose sum is σ = 523544. Its totient is φ = 523542.

The previous prime is 523541. The next prime is 523553. The reversal of 523543 is 345325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523543 - 2¹ = 523541 is a prime.

Together with 523541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261771 + 261772.

It is an arithmetic number, because the mean of its divisors is an integer number (261772).

2⁵²³⁵⁴³ is an apocalyptic number.

523543 is a deficient number, since it is larger than the sum of its proper divisors (1).

523543 is an equidigital number, since it uses as much as digits as its factorization.

523543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 22.

The square root of 523543 is about 723.5627132461. The cubic root of 523543 is about 80.5967356809.

Adding to 523543 its reverse (345325), we get a palindrome (868868).

The spelling of 523543 in words is "five hundred twenty-three thousand, five hundred forty-three".