144943993 has 2 divisors, whose sum is σ = 144943994. Its totient is φ = 144943992.

The previous prime is 144943987. The next prime is 144944039. The reversal of 144943993 is 399349441.

It is a happy number.

It is an a-pointer prime, because the next prime (144944039) can be obtained adding 144943993 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141800464 + 3143529 = 11908^2 + 1773^2 .

It is an emirp because it is prime and its reverse (399349441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144943993 - 2⁵ = 144943961 is a prime.

It is a super-2 number, since 2×144943993² = 42017522213568098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144943973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72471996 + 72471997.

It is an arithmetic number, because the mean of its divisors is an integer number (72471997).

Almost surely, 2^144943993 is an apocalyptic number.

It is an amenable number.

144943993 is a deficient number, since it is larger than the sum of its proper divisors (1).

144943993 is an equidigital number, since it uses as much as digits as its factorization.

144943993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 144943993 is about 12039.2687900885. The cubic root of 144943993 is about 525.2911376889.

The spelling of 144943993 in words is "one hundred forty-four million, nine hundred forty-three thousand, nine hundred ninety-three".