144437509 has 2 divisors, whose sum is σ = 144437510. Its totient is φ = 144437508.

The previous prime is 144437483. The next prime is 144437519. The reversal of 144437509 is 905734441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144360225 + 77284 = 12015^2 + 278^2 .

It is an emirp because it is prime and its reverse (905734441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144437509 - 2¹⁹ = 143913221 is a prime.

It is a super-2 number, since 2×144437509² = 41724388012250162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144437519) 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, 72218754 + 72218755.

It is an arithmetic number, because the mean of its divisors is an integer number (72218755).

Almost surely, 2^144437509 is an apocalyptic number.

It is an amenable number.

144437509 is a deficient number, since it is larger than the sum of its proper divisors (1).

144437509 is an equidigital number, since it uses as much as digits as its factorization.

144437509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 144437509 is about 12018.2157161535. The cubic root of 144437509 is about 524.6785745284.

It can be divided in two parts, 14443 and 7509, that added together give a cube (21952 = 28³).

The spelling of 144437509 in words is "one hundred forty-four million, four hundred thirty-seven thousand, five hundred nine".