144339509 has 4 divisors (see below), whose sum is σ = 144943680. Its totient is φ = 143735340.

The previous prime is 144339493. The next prime is 144339527. The reversal of 144339509 is 905933441.

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: 905933441 = 7 ⋅129419063.

It is a cyclic number.

It is not a de Polignac number, because 144339509 - 2⁴ = 144339493 is a prime.

It is a super-2 number, since 2×144339509² = 41667787716722162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144339709) 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 in 3 ways as a sum of consecutive naturals, for example, 301727 + ... + 302204.

It is an arithmetic number, because the mean of its divisors is an integer number (36235920).

Almost surely, 2^144339509 is an apocalyptic number.

It is an amenable number.

144339509 is a deficient number, since it is larger than the sum of its proper divisors (604171).

144339509 is an equidigital number, since it uses as much as digits as its factorization.

144339509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604170.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 144339509 is about 12014.1378800145. The cubic root of 144339509 is about 524.5598839055.

The spelling of 144339509 in words is "one hundred forty-four million, three hundred thirty-nine thousand, five hundred nine".