1316593493 has 2 divisors, whose sum is σ = 1316593494. Its totient is φ = 1316593492.

The previous prime is 1316593477. The next prime is 1316593547. The reversal of 1316593493 is 3943956131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178342929 + 138250564 = 34327^2 + 11758^2 .

It is an emirp because it is prime and its reverse (3943956131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1316593493 - 2⁴ = 1316593477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316593463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658296746 + 658296747.

It is an arithmetic number, because the mean of its divisors is an integer number (658296747).

Almost surely, 2^1316593493 is an apocalyptic number.

It is an amenable number.

1316593493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316593493 is an equidigital number, since it uses as much as digits as its factorization.

1316593493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 44.

The square root of 1316593493 is about 36284.8934544391. The cubic root of 1316593493 is about 1096.0168596004.

The spelling of 1316593493 in words is "one billion, three hundred sixteen million, five hundred ninety-three thousand, four hundred ninety-three".