144340309 has 4 divisors (see below), whose sum is σ = 148996480. Its totient is φ = 139684140.

The previous prime is 144340223. The next prime is 144340327. The reversal of 144340309 is 903043441.

144340309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 903043441 = 29 ⋅31139429.

It is not a de Polignac number, because 144340309 - 2⁷ = 144340181 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 (144340349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328039 + ... + 2328100.

It is an arithmetic number, because the mean of its divisors is an integer number (37249120).

Almost surely, 2^144340309 is an apocalyptic number.

It is an amenable number.

144340309 is a deficient number, since it is larger than the sum of its proper divisors (4656171).

144340309 is an equidigital number, since it uses as much as digits as its factorization.

144340309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656170.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 144340309 is about 12014.1711740761. The cubic root of 144340309 is about 524.5608530260.

The spelling of 144340309 in words is "one hundred forty-four million, three hundred forty thousand, three hundred nine".