1304635649 has 2 divisors, whose sum is σ = 1304635650. Its totient is φ = 1304635648.

The previous prime is 1304635643. The next prime is 1304635667. The reversal of 1304635649 is 9465364031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682881424 + 621754225 = 26132^2 + 24935^2 .

It is an emirp because it is prime and its reverse (9465364031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1304635649 - 2⁸ = 1304635393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304635643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652317824 + 652317825.

It is an arithmetic number, because the mean of its divisors is an integer number (652317825).

Almost surely, 2^1304635649 is an apocalyptic number.

It is an amenable number.

1304635649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304635649 is an equidigital number, since it uses as much as digits as its factorization.

1304635649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 1304635649 is about 36119.7404337296. The cubic root of 1304635649 is about 1092.6886042328.

The spelling of 1304635649 in words is "one billion, three hundred four million, six hundred thirty-five thousand, six hundred forty-nine".