144445409 has 4 divisors (see below), whose sum is σ = 144480960. Its totient is φ = 144409860.

The previous prime is 144445403. The next prime is 144445459. The reversal of 144445409 is 904544441.

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: 904544441 = 431 ⋅2098711.

It is a cyclic number.

It is not a de Polignac number, because 144445409 - 2⁸ = 144445153 is a prime.

It is a super-3 number, since 3×144445409³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144445403) 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, 10757 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (36120240).

Almost surely, 2^144445409 is an apocalyptic number.

It is an amenable number.

144445409 is a deficient number, since it is larger than the sum of its proper divisors (35551).

144445409 is an equidigital number, since it uses as much as digits as its factorization.

144445409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35550.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 144445409 is about 12018.5443794163. The cubic root of 144445409 is about 524.6881401073.

The spelling of 144445409 in words is "one hundred forty-four million, four hundred forty-five thousand, four hundred nine".