1444240013 has 2 divisors, whose sum is σ = 1444240014. Its totient is φ = 1444240012.

The previous prime is 1444240003. The next prime is 1444240019. The reversal of 1444240013 is 3100424441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407975529 + 36264484 = 37523^2 + 6022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444240013 - 2⁶ = 1444239949 is a prime.

It is a Sophie Germain 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 (1444240019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722120006 + 722120007.

It is an arithmetic number, because the mean of its divisors is an integer number (722120007).

Almost surely, 2^1444240013 is an apocalyptic number.

It is an amenable number.

1444240013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444240013 is an equidigital number, since it uses as much as digits as its factorization.

1444240013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1444240013 is about 38003.1579345717. The cubic root of 1444240013 is about 1130.3504833410.

Adding to 1444240013 its reverse (3100424441), we get a palindrome (4544664454).

The spelling of 1444240013 in words is "one billion, four hundred forty-four million, two hundred forty thousand, thirteen".