144239999 has 4 divisors (see below), whose sum is σ = 144473640. Its totient is φ = 144006360.

The previous prime is 144239989. The next prime is 144240007. The reversal of 144239999 is 999932441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144239999 - 2¹⁶ = 144174463 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 (144239989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115892 + ... + 117129.

It is an arithmetic number, because the mean of its divisors is an integer number (36118410).

Almost surely, 2^144239999 is an apocalyptic number.

144239999 is a deficient number, since it is larger than the sum of its proper divisors (233641).

144239999 is an equidigital number, since it uses as much as digits as its factorization.

144239999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233640.

The product of its digits is 629856, while the sum is 50.

The square root of 144239999 is about 12009.9957951700. The cubic root of 144239999 is about 524.4393094935.

The spelling of 144239999 in words is "one hundred forty-four million, two hundred thirty-nine thousand, nine hundred ninety-nine".