1440043013 has 2 divisors, whose sum is σ = 1440043014. Its totient is φ = 1440043012.

The previous prime is 1440043009. The next prime is 1440043061. The reversal of 1440043013 is 3103400441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782992324 + 657050689 = 27982^2 + 25633^2 .

It is an emirp because it is prime and its reverse (3103400441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440043013 - 2² = 1440043009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440043063) 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, 720021506 + 720021507.

It is an arithmetic number, because the mean of its divisors is an integer number (720021507).

Almost surely, 2^1440043013 is an apocalyptic number.

It is an amenable number.

1440043013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440043013 is an equidigital number, since it uses as much as digits as its factorization.

1440043013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1440043013 is about 37947.8986638259. The cubic root of 1440043013 is about 1129.2544780960.

Adding to 1440043013 its reverse (3103400441), we get a palindrome (4543443454).

The spelling of 1440043013 in words is "one billion, four hundred forty million, forty-three thousand, thirteen".