144338209 has 4 divisors (see below), whose sum is σ = 144471600. Its totient is φ = 144204820.

The previous prime is 144338203. The next prime is 144338213. The reversal of 144338209 is 902833441.

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: 902833441 = 7603 ⋅118747.

It is a cyclic number.

It is not a de Polignac number, because 144338209 - 2¹⁷ = 144207137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144338203) 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, 65059 + ... + 67240.

It is an arithmetic number, because the mean of its divisors is an integer number (36117900).

Almost surely, 2^144338209 is an apocalyptic number.

It is an amenable number.

144338209 is a deficient number, since it is larger than the sum of its proper divisors (133391).

144338209 is a wasteful number, since it uses less digits than its factorization.

144338209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133390.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 144338209 is about 12014.0837769678. The cubic root of 144338209 is about 524.5583090770.

The spelling of 144338209 in words is "one hundred forty-four million, three hundred thirty-eight thousand, two hundred nine".