144194509 has 2 divisors, whose sum is σ = 144194510. Its totient is φ = 144194508.

The previous prime is 144194483. The next prime is 144194537. The reversal of 144194509 is 905491441.

144194509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144072009 + 122500 = 12003^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 144194509 - 2⁹ = 144193997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144194579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72097254 + 72097255.

It is an arithmetic number, because the mean of its divisors is an integer number (72097255).

Almost surely, 2^144194509 is an apocalyptic number.

It is an amenable number.

144194509 is a deficient number, since it is larger than the sum of its proper divisors (1).

144194509 is an equidigital number, since it uses as much as digits as its factorization.

144194509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 144194509 is about 12008.1018066970. The cubic root of 144194509 is about 524.3841716382.

The spelling of 144194509 in words is "one hundred forty-four million, one hundred ninety-four thousand, five hundred nine".