144672209 has 4 divisors (see below), whose sum is σ = 157824240. Its totient is φ = 131520180.

The previous prime is 144672191. The next prime is 144672217. The reversal of 144672209 is 902276441.

144672209 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: 902276441 = 11 ⋅82025131.

It is not a de Polignac number, because 144672209 - 2²⁴ = 127894993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144672509) 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, 6575999 + ... + 6576020.

It is an arithmetic number, because the mean of its divisors is an integer number (39456060).

Almost surely, 2^144672209 is an apocalyptic number.

It is an amenable number.

144672209 is a deficient number, since it is larger than the sum of its proper divisors (13152031).

144672209 is a wasteful number, since it uses less digits than its factorization.

144672209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152030.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 144672209 is about 12027.9760974156. The cubic root of 144672209 is about 524.9626083725.

The spelling of 144672209 in words is "one hundred forty-four million, six hundred seventy-two thousand, two hundred nine".