1440130649 has 2 divisors, whose sum is σ = 1440130650. Its totient is φ = 1440130648.

The previous prime is 1440130621. The next prime is 1440130651. The reversal of 1440130649 is 9460310441.

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., 1060153600 + 379977049 = 32560^2 + 19493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440130649 - 2¹⁶ = 1440065113 is a prime.

It is a super-2 number, since 2×1440130649² = 4147952572378322402, which contains 22 as substring.

Together with 1440130651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1440180649) 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, 720065324 + 720065325.

It is an arithmetic number, because the mean of its divisors is an integer number (720065325).

Almost surely, 2^1440130649 is an apocalyptic number.

It is an amenable number.

1440130649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440130649 is an equidigital number, since it uses as much as digits as its factorization.

1440130649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1440130649 is about 37949.0533347012. The cubic root of 1440130649 is about 1129.2773851289.

The spelling of 1440130649 in words is "one billion, four hundred forty million, one hundred thirty thousand, six hundred forty-nine".