144123409 has 2 divisors, whose sum is σ = 144123410. Its totient is φ = 144123408.

The previous prime is 144123407. The next prime is 144123431. The reversal of 144123409 is 904321441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 62853184 = 9015^2 + 7928^2 .

It is a cyclic number.

It is not a de Polignac number, because 144123409 - 2¹ = 144123407 is a prime.

Together with 144123407, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144123403) 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, 72061704 + 72061705.

It is an arithmetic number, because the mean of its divisors is an integer number (72061705).

Almost surely, 2^144123409 is an apocalyptic number.

It is an amenable number.

144123409 is a deficient number, since it is larger than the sum of its proper divisors (1).

144123409 is an equidigital number, since it uses as much as digits as its factorization.

144123409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 144123409 is about 12005.1409404471. The cubic root of 144123409 is about 524.2979689930.

The spelling of 144123409 in words is "one hundred forty-four million, one hundred twenty-three thousand, four hundred nine".