1309311293 has 2 divisors, whose sum is σ = 1309311294. Its totient is φ = 1309311292.

The previous prime is 1309311281. The next prime is 1309311313. The reversal of 1309311293 is 3921139031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017482404 + 291828889 = 31898^2 + 17083^2 .

It is an emirp because it is prime and its reverse (3921139031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1309311293 - 2⁴ = 1309311277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309310293) 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, 654655646 + 654655647.

It is an arithmetic number, because the mean of its divisors is an integer number (654655647).

Almost surely, 2^1309311293 is an apocalyptic number.

It is an amenable number.

1309311293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309311293 is an equidigital number, since it uses as much as digits as its factorization.

1309311293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 1309311293 is about 36184.4067658985. The cubic root of 1309311293 is about 1093.9923990729.

The spelling of 1309311293 in words is "one billion, three hundred nine million, three hundred eleven thousand, two hundred ninety-three".