144409 has 2 divisors, whose sum is σ = 144410. Its totient is φ = 144408.

The previous prime is 144407. The next prime is 144413. The reversal of 144409 is 904441.

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., 144400 + 9 = 380^2 + 3^2 .

It is an emirp because it is prime and its reverse (904441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144409 - 2¹ = 144407 is a prime.

Together with 144407, it forms a pair of twin primes.

It is an Ulam number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 144409.

It is not a weakly prime, because it can be changed into another prime (144407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72204 + 72205.

It is an arithmetic number, because the mean of its divisors is an integer number (72205).

2¹⁴⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

144409 is a deficient number, since it is larger than the sum of its proper divisors (1).

144409 is an equidigital number, since it uses as much as digits as its factorization.

144409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 144409 is about 380.0118419207. The cubic root of 144409 is about 52.4644051996.

The spelling of 144409 in words is "one hundred forty-four thousand, four hundred nine".