144209321 has 2 divisors, whose sum is σ = 144209322. Its totient is φ = 144209320.

The previous prime is 144209311. The next prime is 144209353. The reversal of 144209321 is 123902441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85303696 + 58905625 = 9236^2 + 7675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144209321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144209311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72104660 + 72104661.

It is an arithmetic number, because the mean of its divisors is an integer number (72104661).

Almost surely, 2^144209321 is an apocalyptic number.

It is an amenable number.

144209321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144209321 is an equidigital number, since it uses as much as digits as its factorization.

144209321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 144209321 is about 12008.7185411267. The cubic root of 144209321 is about 524.4021263497.

The spelling of 144209321 in words is "one hundred forty-four million, two hundred nine thousand, three hundred twenty-one".