1323113513 has 2 divisors, whose sum is σ = 1323113514. Its totient is φ = 1323113512.

The previous prime is 1323113461. The next prime is 1323113537. The reversal of 1323113513 is 3153113231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 859486489 + 463627024 = 29317^2 + 21532^2 .

It is an emirp because it is prime and its reverse (3153113231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323113513 - 2²² = 1318919209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323113413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661556756 + 661556757.

It is an arithmetic number, because the mean of its divisors is an integer number (661556757).

Almost surely, 2^1323113513 is an apocalyptic number.

It is an amenable number.

1323113513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323113513 is an equidigital number, since it uses as much as digits as its factorization.

1323113513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 23.

The square root of 1323113513 is about 36374.6273245514. The cubic root of 1323113513 is about 1097.8231088413.

Adding to 1323113513 its reverse (3153113231), we get a palindrome (4476226744).

The spelling of 1323113513 in words is "one billion, three hundred twenty-three million, one hundred thirteen thousand, five hundred thirteen".