320144549 has 2 divisors, whose sum is σ = 320144550. Its totient is φ = 320144548.

The previous prime is 320144501. The next prime is 320144557. The reversal of 320144549 is 945441023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295324225 + 24820324 = 17185^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 320144549 - 2¹⁶ = 320079013 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320144569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160072274 + 160072275.

It is an arithmetic number, because the mean of its divisors is an integer number (160072275).

Almost surely, 2^320144549 is an apocalyptic number.

It is an amenable number.

320144549 is a deficient number, since it is larger than the sum of its proper divisors (1).

320144549 is an equidigital number, since it uses as much as digits as its factorization.

320144549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 320144549 is about 17892.5836312144. The cubic root of 320144549 is about 684.0933528810.

It can be divided in two parts, 32014 and 4549, that added together give a palindrome (36563).

The spelling of 320144549 in words is "three hundred twenty million, one hundred forty-four thousand, five hundred forty-nine".