144032309 has 4 divisors (see below), whose sum is σ = 144593004. Its totient is φ = 143471616.

The previous prime is 144032297. The next prime is 144032359. The reversal of 144032309 is 903230441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903230441 = 283 ⋅3191627.

It can be written as a sum of positive squares in 2 ways, for example, as 122036209 + 21996100 = 11047^2 + 4690^2 .

It is a cyclic number.

It is not a de Polignac number, because 144032309 - 2²⁰ = 142983733 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 (144032359) 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, 279962 + ... + 280475.

It is an arithmetic number, because the mean of its divisors is an integer number (36148251).

Almost surely, 2^144032309 is an apocalyptic number.

It is an amenable number.

144032309 is a deficient number, since it is larger than the sum of its proper divisors (560695).

144032309 is an equidigital number, since it uses as much as digits as its factorization.

144032309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560694.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 144032309 is about 12001.3461328303. The cubic root of 144032309 is about 524.1874766204.

The spelling of 144032309 in words is "one hundred forty-four million, thirty-two thousand, three hundred nine".