1309013 has 2 divisors, whose sum is σ = 1309014. Its totient is φ = 1309012.

The previous prime is 1308977. The next prime is 1309039. The reversal of 1309013 is 3109031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734449 + 574564 = 857^2 + 758^2 .

It is an emirp because it is prime and its reverse (3109031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1309013 - 2⁸ = 1308757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1308982 and 1309000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309073) 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, 654506 + 654507.

It is an arithmetic number, because the mean of its divisors is an integer number (654507).

2^1309013 is an apocalyptic number.

It is an amenable number.

1309013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309013 is an equidigital number, since it uses as much as digits as its factorization.

1309013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1309013 is about 1144.1210600282. The cubic root of 1309013 is about 109.3909313392.

The spelling of 1309013 in words is "one million, three hundred nine thousand, thirteen".