144405013 has 2 divisors, whose sum is σ = 144405014. Its totient is φ = 144405012.

The previous prime is 144404999. The next prime is 144405029. The reversal of 144405013 is 310504441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143448529 + 956484 = 11977^2 + 978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144405013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144405083) 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, 72202506 + 72202507.

It is an arithmetic number, because the mean of its divisors is an integer number (72202507).

Almost surely, 2^144405013 is an apocalyptic number.

It is an amenable number.

144405013 is a deficient number, since it is larger than the sum of its proper divisors (1).

144405013 is an equidigital number, since it uses as much as digits as its factorization.

144405013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 144405013 is about 12016.8636923284. The cubic root of 144405013 is about 524.6392236379.

Adding to 144405013 its reverse (310504441), we get a palindrome (454909454).

The spelling of 144405013 in words is "one hundred forty-four million, four hundred five thousand, thirteen".