144538809 has 8 divisors (see below), whose sum is σ = 192927840. Its totient is φ = 96254496.

The previous prime is 144538799. The next prime is 144538819. The reversal of 144538809 is 908835441.

It is an interprime number because it is at equal distance from previous prime (144538799) and next prime (144538819).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144538809 - 2⁸ = 144538553 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144538819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22899 + ... + 28520.

It is an arithmetic number, because the mean of its divisors is an integer number (24115980).

Almost surely, 2^144538809 is an apocalyptic number.

It is an amenable number.

144538809 is a deficient number, since it is larger than the sum of its proper divisors (48389031).

144538809 is an equidigital number, since it uses as much as digits as its factorization.

144538809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52359.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 144538809 is about 12022.4294133923. The cubic root of 144538809 is about 524.8012054603.

The spelling of 144538809 in words is "one hundred forty-four million, five hundred thirty-eight thousand, eight hundred nine".