1440275489 has 2 divisors, whose sum is σ = 1440275490. Its totient is φ = 1440275488.

The previous prime is 1440275413. The next prime is 1440275537. The reversal of 1440275489 is 9845720441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223950225 + 216325264 = 34985^2 + 14708^2 .

It is an emirp because it is prime and its reverse (9845720441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440275489 - 2²⁰ = 1439226913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440275189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720137744 + 720137745.

It is an arithmetic number, because the mean of its divisors is an integer number (720137745).

Almost surely, 2^1440275489 is an apocalyptic number.

It is an amenable number.

1440275489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440275489 is an equidigital number, since it uses as much as digits as its factorization.

1440275489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 1440275489 is about 37950.9616347201. The cubic root of 1440275489 is about 1129.3152425862.

The spelling of 1440275489 in words is "one billion, four hundred forty million, two hundred seventy-five thousand, four hundred eighty-nine".