144023993 has 2 divisors, whose sum is σ = 144023994. Its totient is φ = 144023992.

The previous prime is 144023981. The next prime is 144024059. The reversal of 144023993 is 399320441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141324544 + 2699449 = 11888^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 144023993 - 2⁴ = 144023977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (144023293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72011996 + 72011997.

It is an arithmetic number, because the mean of its divisors is an integer number (72011997).

Almost surely, 2^144023993 is an apocalyptic number.

It is an amenable number.

144023993 is a deficient number, since it is larger than the sum of its proper divisors (1).

144023993 is an equidigital number, since it uses as much as digits as its factorization.

144023993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 144023993 is about 12000.9996666944. Note that the first 3 decimals coincide. The cubic root of 144023993 is about 524.1773880808.

The spelling of 144023993 in words is "one hundred forty-four million, twenty-three thousand, nine hundred ninety-three".