423541543 has 2 divisors, whose sum is σ = 423541544. Its totient is φ = 423541542.

The previous prime is 423541537. The next prime is 423541567. The reversal of 423541543 is 345145324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423541543 - 2⁵ = 423541511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423541513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211770771 + 211770772.

It is an arithmetic number, because the mean of its divisors is an integer number (211770772).

Almost surely, 2^423541543 is an apocalyptic number.

423541543 is a deficient number, since it is larger than the sum of its proper divisors (1).

423541543 is an equidigital number, since it uses as much as digits as its factorization.

423541543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 31.

The square root of 423541543 is about 20580.1249510298. The cubic root of 423541543 is about 750.9862834617.

Adding to 423541543 its reverse (345145324), we get a palindrome (768686867).

The spelling of 423541543 in words is "four hundred twenty-three million, five hundred forty-one thousand, five hundred forty-three".