144764509 has 2 divisors, whose sum is σ = 144764510. Its totient is φ = 144764508.

The previous prime is 144764489. The next prime is 144764569. The reversal of 144764509 is 905467441.

144764509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90668484 + 54096025 = 9522^2 + 7355^2 .

It is a cyclic number.

It is not a de Polignac number, because 144764509 - 2¹³ = 144756317 is a prime.

It is a super-2 number, since 2×144764509² = 41913526132022162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144764569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72382254 + 72382255.

It is an arithmetic number, because the mean of its divisors is an integer number (72382255).

Almost surely, 2^144764509 is an apocalyptic number.

It is an amenable number.

144764509 is a deficient number, since it is larger than the sum of its proper divisors (1).

144764509 is an equidigital number, since it uses as much as digits as its factorization.

144764509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 144764509 is about 12031.8123738695. The cubic root of 144764509 is about 525.0742256353.

It can be divided in two parts, 1447 and 64509, that added together give a palindrome (65956).

The spelling of 144764509 in words is "one hundred forty-four million, seven hundred sixty-four thousand, five hundred nine".