1440273469 has 2 divisors, whose sum is σ = 1440273470. Its totient is φ = 1440273468.

The previous prime is 1440273467. The next prime is 1440273481. The reversal of 1440273469 is 9643720441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1393528900 + 46744569 = 37330^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440273469 - 2¹ = 1440273467 is a prime.

It is a super-2 number, since 2×1440273469² = 4148775331010587922, which contains 22 as substring.

Together with 1440273467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440273467) 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, 720136734 + 720136735.

It is an arithmetic number, because the mean of its divisors is an integer number (720136735).

Almost surely, 2^1440273469 is an apocalyptic number.

It is an amenable number.

1440273469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440273469 is an equidigital number, since it uses as much as digits as its factorization.

1440273469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 1440273469 is about 37950.9350214194. The cubic root of 1440273469 is about 1129.3147146275.

The spelling of 1440273469 in words is "one billion, four hundred forty million, two hundred seventy-three thousand, four hundred sixty-nine".