544312345 has 4 divisors (see below), whose sum is σ = 653174820. Its totient is φ = 435449872.

The previous prime is 544312343. The next prime is 544312357. The reversal of 544312345 is 543213445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543213445 = 5 ⋅108642689.

It can be written as a sum of positive squares in 2 ways, for example, as 223472601 + 320839744 = 14949^2 + 17912^2 .

It is a cyclic number.

It is not a de Polignac number, because 544312345 - 2¹ = 544312343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (544312343) 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, 54431230 + ... + 54431239.

It is an arithmetic number, because the mean of its divisors is an integer number (163293705).

Almost surely, 2^544312345 is an apocalyptic number.

It is an amenable number.

544312345 is a deficient number, since it is larger than the sum of its proper divisors (108862475).

544312345 is a wasteful number, since it uses less digits than its factorization.

544312345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108862474.

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

The square root of 544312345 is about 23330.5024592271. The cubic root of 544312345 is about 816.4872263446.

The spelling of 544312345 in words is "five hundred forty-four million, three hundred twelve thousand, three hundred forty-five".