1440324649 has 2 divisors, whose sum is σ = 1440324650. Its totient is φ = 1440324648.

The previous prime is 1440324631. The next prime is 1440324667. The reversal of 1440324649 is 9464230441.

It is a balanced prime because it is at equal distance from previous prime (1440324631) and next prime (1440324667).

It can be written as a sum of positive squares in only one way, i.e., 1416167424 + 24157225 = 37632^2 + 4915^2 .

It is an emirp because it is prime and its reverse (9464230441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440324649 - 2⁷ = 1440324521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440324349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720162324 + 720162325.

It is an arithmetic number, because the mean of its divisors is an integer number (720162325).

Almost surely, 2^1440324649 is an apocalyptic number.

It is an amenable number.

1440324649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440324649 is an equidigital number, since it uses as much as digits as its factorization.

1440324649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 1440324649 is about 37951.6093071163. The cubic root of 1440324649 is about 1129.3280911711.

The spelling of 1440324649 in words is "one billion, four hundred forty million, three hundred twenty-four thousand, six hundred forty-nine".