144404321 has 2 divisors, whose sum is σ = 144404322. Its totient is φ = 144404320.

The previous prime is 144404317. The next prime is 144404333. The reversal of 144404321 is 123404441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87235600 + 57168721 = 9340^2 + 7561^2 .

It is an emirp because it is prime and its reverse (123404441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144404321 - 2² = 144404317 is a prime.

It is not a weakly prime, because it can be changed into another prime (144404371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72202160 + 72202161.

It is an arithmetic number, because the mean of its divisors is an integer number (72202161).

Almost surely, 2^144404321 is an apocalyptic number.

It is an amenable number.

144404321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144404321 is an equidigital number, since it uses as much as digits as its factorization.

144404321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 144404321 is about 12016.8348994234. The cubic root of 144404321 is about 524.6383855993.

Adding to 144404321 its reverse (123404441), we get a palindrome (267808762).

The spelling of 144404321 in words is "one hundred forty-four million, four hundred four thousand, three hundred twenty-one".