1315407649 has 2 divisors, whose sum is σ = 1315407650. Its totient is φ = 1315407648.

The previous prime is 1315407637. The next prime is 1315407673. The reversal of 1315407649 is 9467045131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120107024 + 195300625 = 33468^2 + 13975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315407649 - 2¹¹ = 1315405601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315407679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657703824 + 657703825.

It is an arithmetic number, because the mean of its divisors is an integer number (657703825).

Almost surely, 2^1315407649 is an apocalyptic number.

It is an amenable number.

1315407649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315407649 is an equidigital number, since it uses as much as digits as its factorization.

1315407649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1315407649 is about 36268.5490335635. The cubic root of 1315407649 is about 1095.6877032258.

The spelling of 1315407649 in words is "one billion, three hundred fifteen million, four hundred seven thousand, six hundred forty-nine".