1440357493 has 2 divisors, whose sum is σ = 1440357494. Its totient is φ = 1440357492.

The previous prime is 1440357481. The next prime is 1440357517. The reversal of 1440357493 is 3947530441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1439595364 + 762129 = 37942^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440357493 - 2¹³ = 1440349301 is a prime.

It is a super-3 number, since 3×1440357493³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440357293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720178746 + 720178747.

It is an arithmetic number, because the mean of its divisors is an integer number (720178747).

Almost surely, 2^1440357493 is an apocalyptic number.

It is an amenable number.

1440357493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440357493 is an equidigital number, since it uses as much as digits as its factorization.

1440357493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 1440357493 is about 37952.0420135729. The cubic root of 1440357493 is about 1129.3366752010.

The spelling of 1440357493 in words is "one billion, four hundred forty million, three hundred fifty-seven thousand, four hundred ninety-three".