1440234013 has 2 divisors, whose sum is σ = 1440234014. Its totient is φ = 1440234012.

The previous prime is 1440234001. The next prime is 1440234049. The reversal of 1440234013 is 3104320441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085175364 + 355058649 = 32942^2 + 18843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440234013 - 2¹⁷ = 1440102941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440234083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720117006 + 720117007.

It is an arithmetic number, because the mean of its divisors is an integer number (720117007).

Almost surely, 2^1440234013 is an apocalyptic number.

It is an amenable number.

1440234013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440234013 is an equidigital number, since it uses as much as digits as its factorization.

1440234013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1440234013 is about 37950.4151887697. The cubic root of 1440234013 is about 1129.3044020840.

Adding to 1440234013 its reverse (3104320441), we get a palindrome (4544554454).

The spelling of 1440234013 in words is "one billion, four hundred forty million, two hundred thirty-four thousand, thirteen".