144243509 has 2 divisors, whose sum is σ = 144243510. Its totient is φ = 144243508.

The previous prime is 144243481. The next prime is 144243523. The reversal of 144243509 is 905342441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137405284 + 6838225 = 11722^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 144243509 - 2²⁴ = 127466293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144243599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72121754 + 72121755.

It is an arithmetic number, because the mean of its divisors is an integer number (72121755).

Almost surely, 2^144243509 is an apocalyptic number.

It is an amenable number.

144243509 is a deficient number, since it is larger than the sum of its proper divisors (1).

144243509 is an equidigital number, since it uses as much as digits as its factorization.

144243509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 144243509 is about 12010.1419225586. The cubic root of 144243509 is about 524.4435634385.

The spelling of 144243509 in words is "one hundred forty-four million, two hundred forty-three thousand, five hundred nine".