144321329 has 2 divisors, whose sum is σ = 144321330. Its totient is φ = 144321328.

The previous prime is 144321311. The next prime is 144321377. The reversal of 144321329 is 923123441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114597025 + 29724304 = 10705^2 + 5452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144321329 is a prime.

It is not a weakly prime, because it can be changed into another prime (144320329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72160664 + 72160665.

It is an arithmetic number, because the mean of its divisors is an integer number (72160665).

Almost surely, 2^144321329 is an apocalyptic number.

It is an amenable number.

144321329 is a deficient number, since it is larger than the sum of its proper divisors (1).

144321329 is an equidigital number, since it uses as much as digits as its factorization.

144321329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 144321329 is about 12013.3812475922. The cubic root of 144321329 is about 524.5378596767.

The spelling of 144321329 in words is "one hundred forty-four million, three hundred twenty-one thousand, three hundred twenty-nine".