144165649 has 2 divisors, whose sum is σ = 144165650. Its totient is φ = 144165648.

The previous prime is 144165647. The next prime is 144165667. The reversal of 144165649 is 946561441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144000000 + 165649 = 12000^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 144165649 - 2¹ = 144165647 is a prime.

Together with 144165647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (144165643) 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, 72082824 + 72082825.

It is an arithmetic number, because the mean of its divisors is an integer number (72082825).

Almost surely, 2^144165649 is an apocalyptic number.

It is an amenable number.

144165649 is a deficient number, since it is larger than the sum of its proper divisors (1).

144165649 is an equidigital number, since it uses as much as digits as its factorization.

144165649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 144165649 is about 12006.9000578834. The cubic root of 144165649 is about 524.3491847836.

It can be divided in two parts, 144 and 165649, that multiplied together give a square (23853456 = 4884²).

The spelling of 144165649 in words is "one hundred forty-four million, one hundred sixty-five thousand, six hundred forty-nine".