545304239 has 4 divisors (see below), whose sum is σ = 545764824. Its totient is φ = 544843656.

The previous prime is 545304191. The next prime is 545304281. The reversal of 545304239 is 932403545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932403545 = 5 ⋅186480709.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545304239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545304199 and 545304208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545304299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228512 + ... + 230885.

It is an arithmetic number, because the mean of its divisors is an integer number (136441206).

Almost surely, 2^545304239 is an apocalyptic number.

545304239 is a deficient number, since it is larger than the sum of its proper divisors (460585).

545304239 is a wasteful number, since it uses less digits than its factorization.

545304239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460584.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 545304239 is about 23351.7502341902. The cubic root of 545304239 is about 816.9828837539.

The spelling of 545304239 in words is "five hundred forty-five million, three hundred four thousand, two hundred thirty-nine".