1305364673 has 2 divisors, whose sum is σ = 1305364674. Its totient is φ = 1305364672.

The previous prime is 1305364663. The next prime is 1305364721. The reversal of 1305364673 is 3764635031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1298305024 + 7059649 = 36032^2 + 2657^2 .

It is an emirp because it is prime and its reverse (3764635031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305364673 - 2¹² = 1305360577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305364663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652682336 + 652682337.

It is an arithmetic number, because the mean of its divisors is an integer number (652682337).

Almost surely, 2^1305364673 is an apocalyptic number.

It is an amenable number.

1305364673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305364673 is an equidigital number, since it uses as much as digits as its factorization.

1305364673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 38.

The square root of 1305364673 is about 36129.8307911897. The cubic root of 1305364673 is about 1092.8920960112.

The spelling of 1305364673 in words is "one billion, three hundred five million, three hundred sixty-four thousand, six hundred seventy-three".