545981323 has 4 divisors (see below), whose sum is σ = 546872608. Its totient is φ = 545090040.

The previous prime is 545981311. The next prime is 545981341. The reversal of 545981323 is 323189545.

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 545981323 - 2²¹ = 543884171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545981353) 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, 444723 + ... + 445948.

It is an arithmetic number, because the mean of its divisors is an integer number (136718152).

Almost surely, 2^545981323 is an apocalyptic number.

545981323 is a deficient number, since it is larger than the sum of its proper divisors (891285).

545981323 is an equidigital number, since it uses as much as digits as its factorization.

545981323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891284.

The product of its digits is 129600, while the sum is 40.

The square root of 545981323 is about 23366.2432367721. The cubic root of 545981323 is about 817.3208829896.

The spelling of 545981323 in words is "five hundred forty-five million, nine hundred eighty-one thousand, three hundred twenty-three".