1304243609 has 2 divisors, whose sum is σ = 1304243610. Its totient is φ = 1304243608.

The previous prime is 1304243531. The next prime is 1304243693. The reversal of 1304243609 is 9063424031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1252806025 + 51437584 = 35395^2 + 7172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304243609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304243509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652121804 + 652121805.

It is an arithmetic number, because the mean of its divisors is an integer number (652121805).

Almost surely, 2^1304243609 is an apocalyptic number.

It is an amenable number.

1304243609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304243609 is an equidigital number, since it uses as much as digits as its factorization.

1304243609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1304243609 is about 36114.3130766736. The cubic root of 1304243609 is about 1092.5791431337.

The spelling of 1304243609 in words is "one billion, three hundred four million, two hundred forty-three thousand, six hundred nine".