1817316913 has 2 divisors, whose sum is σ = 1817316914. Its totient is φ = 1817316912.

The previous prime is 1817316877. The next prime is 1817316953. The reversal of 1817316913 is 3196137181.

It is an a-pointer prime, because the next prime (1817316953) can be obtained adding 1817316913 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1812375184 + 4941729 = 42572^2 + 2223^2 .

It is an emirp because it is prime and its reverse (3196137181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1817316913 - 2⁹ = 1817316401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1817316953) 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, 908658456 + 908658457.

It is an arithmetic number, because the mean of its divisors is an integer number (908658457).

Almost surely, 2^1817316913 is an apocalyptic number.

It is an amenable number.

1817316913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1817316913 is an equidigital number, since it uses as much as digits as its factorization.

1817316913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 1817316913 is about 42630.0001524748. Note that the first 3 decimals coincide. The cubic root of 1817316913 is about 1220.3288804735.

The spelling of 1817316913 in words is "one billion, eight hundred seventeen million, three hundred sixteen thousand, nine hundred thirteen".