545444123 has 4 divisors (see below), whose sum is σ = 623364720. Its totient is φ = 467523528.

The previous prime is 545444117. The next prime is 545444143. The reversal of 545444123 is 321444545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545444123 - 2⁸ = 545443867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545444123.

It is not an unprimeable number, because it can be changed into a prime (545444143) 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 in 3 ways as a sum of consecutive naturals, for example, 38960288 + ... + 38960301.

It is an arithmetic number, because the mean of its divisors is an integer number (155841180).

Almost surely, 2^545444123 is an apocalyptic number.

545444123 is a deficient number, since it is larger than the sum of its proper divisors (77920597).

545444123 is an equidigital number, since it uses as much as digits as its factorization.

545444123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77920596.

The product of its digits is 38400, while the sum is 32.

The square root of 545444123 is about 23354.7451923587. The cubic root of 545444123 is about 817.0527365411.

Adding to 545444123 its reverse (321444545), we get a palindrome (866888668).

The spelling of 545444123 in words is "five hundred forty-five million, four hundred forty-four thousand, one hundred twenty-three".