1315111649 has 2 divisors, whose sum is σ = 1315111650. Its totient is φ = 1315111648.

The previous prime is 1315111643. The next prime is 1315111663. The reversal of 1315111649 is 9461115131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1228993249 + 86118400 = 35057^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315111649 - 2⁸ = 1315111393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315111643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657555824 + 657555825.

It is an arithmetic number, because the mean of its divisors is an integer number (657555825).

Almost surely, 2^1315111649 is an apocalyptic number.

It is an amenable number.

1315111649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315111649 is an equidigital number, since it uses as much as digits as its factorization.

1315111649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 32.

The square root of 1315111649 is about 36264.4681334223. The cubic root of 1315111649 is about 1095.6055112426.

The spelling of 1315111649 in words is "one billion, three hundred fifteen million, one hundred eleven thousand, six hundred forty-nine".