544742321 has 4 divisors (see below), whose sum is σ = 555020532. Its totient is φ = 534464112.

The previous prime is 544742311. The next prime is 544742329. The reversal of 544742321 is 123247445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123247445 = 5 ⋅24649489.

It can be written as a sum of positive squares in 2 ways, for example, as 363436096 + 181306225 = 19064^2 + 13465^2 .

It is a cyclic number.

It is not a de Polignac number, because 544742321 - 2¹⁸ = 544480177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (544742329) 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, 5139026 + ... + 5139131.

It is an arithmetic number, because the mean of its divisors is an integer number (138755133).

Almost surely, 2^544742321 is an apocalyptic number.

It is an amenable number.

544742321 is a deficient number, since it is larger than the sum of its proper divisors (10278211).

544742321 is a wasteful number, since it uses less digits than its factorization.

544742321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278210.

The product of its digits is 26880, while the sum is 32.

The square root of 544742321 is about 23339.7155295432. The cubic root of 544742321 is about 816.7021626850.

Adding to 544742321 its reverse (123247445), we get a palindrome (667989766).

The spelling of 544742321 in words is "five hundred forty-four million, seven hundred forty-two thousand, three hundred twenty-one".