1361320993 has 2 divisors, whose sum is σ = 1361320994. Its totient is φ = 1361320992.

The previous prime is 1361320981. The next prime is 1361321077. The reversal of 1361320993 is 3990231631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031244769 + 330076224 = 32113^2 + 18168^2 .

It is an emirp because it is prime and its reverse (3990231631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361320993 - 2¹³ = 1361312801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361320903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680660496 + 680660497.

It is an arithmetic number, because the mean of its divisors is an integer number (680660497).

Almost surely, 2^1361320993 is an apocalyptic number.

It is an amenable number.

1361320993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361320993 is an equidigital number, since it uses as much as digits as its factorization.

1361320993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 1361320993 is about 36896.0837081661. The cubic root of 1361320993 is about 1108.2902533968.

The spelling of 1361320993 in words is "one billion, three hundred sixty-one million, three hundred twenty thousand, nine hundred ninety-three".