144509509 has 4 divisors (see below), whose sum is σ = 144556960. Its totient is φ = 144462060.

The previous prime is 144509501. The next prime is 144509527. The reversal of 144509509 is 905905441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905905441 = 7 ⋅129415063.

It is a cyclic number.

It is not a de Polignac number, because 144509509 - 2³ = 144509501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144509501) 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 in 3 ways as a sum of consecutive naturals, for example, 18819 + ... + 25360.

It is an arithmetic number, because the mean of its divisors is an integer number (36139240).

Almost surely, 2^144509509 is an apocalyptic number.

It is an amenable number.

144509509 is a deficient number, since it is larger than the sum of its proper divisors (47451).

144509509 is an equidigital number, since it uses as much as digits as its factorization.

144509509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47450.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 144509509 is about 12021.2107959223. The cubic root of 144509509 is about 524.7657415953.

The spelling of 144509509 in words is "one hundred forty-four million, five hundred nine thousand, five hundred nine".