1309513 has 2 divisors, whose sum is σ = 1309514. Its totient is φ = 1309512.

The previous prime is 1309501. The next prime is 1309531. The reversal of 1309513 is 3159031.

Together with next prime (1309531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 200704 = 1053^2 + 448^2 .

It is an emirp because it is prime and its reverse (3159031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1309513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1309013) 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, 654756 + 654757.

It is an arithmetic number, because the mean of its divisors is an integer number (654757).

2^1309513 is an apocalyptic number.

It is an amenable number.

1309513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309513 is an equidigital number, since it uses as much as digits as its factorization.

1309513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 22.

The square root of 1309513 is about 1144.3395475120. The cubic root of 1309513 is about 109.4048574813.

The spelling of 1309513 in words is "one million, three hundred nine thousand, five hundred thirteen".