144394321 has 2 divisors, whose sum is σ = 144394322. Its totient is φ = 144394320.

The previous prime is 144394309. The next prime is 144394331. The reversal of 144394321 is 123493441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77792400 + 66601921 = 8820^2 + 8161^2 .

It is an emirp because it is prime and its reverse (123493441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144394321 - 2⁷ = 144394193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144394331) 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 as a sum of consecutive naturals, namely, 72197160 + 72197161.

It is an arithmetic number, because the mean of its divisors is an integer number (72197161).

Almost surely, 2^144394321 is an apocalyptic number.

It is an amenable number.

144394321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144394321 is an equidigital number, since it uses as much as digits as its factorization.

144394321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 144394321 is about 12016.4188092792. The cubic root of 144394321 is about 524.6262749161.

The spelling of 144394321 in words is "one hundred forty-four million, three hundred ninety-four thousand, three hundred twenty-one".