123345543 has 16 divisors (see below), whose sum is σ = 169969536. Its totient is φ = 79514400.

The previous prime is 123345529. The next prime is 123345571. The reversal of 123345543 is 345543321.

It is not a de Polignac number, because 123345543 - 2¹⁰ = 123344519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123345543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296 + ... + 17762.

It is an arithmetic number, because the mean of its divisors is an integer number (10623096).

Almost surely, 2^123345543 is an apocalyptic number.

123345543 is a deficient number, since it is larger than the sum of its proper divisors (46623993).

123345543 is a wasteful number, since it uses less digits than its factorization.

123345543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614.

The product of its digits is 21600, while the sum is 30.

The square root of 123345543 is about 11106.1038622912. The cubic root of 123345543 is about 497.7842527661.

Adding to 123345543 its reverse (345543321), we get a palindrome (468888864).

The spelling of 123345543 in words is "one hundred twenty-three million, three hundred forty-five thousand, five hundred forty-three".