12317813 has 2 divisors, whose sum is σ = 12317814. Its totient is φ = 12317812.

The previous prime is 12317803. The next prime is 12317827. The reversal of 12317813 is 31871321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 88804 = 3497^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 12317813 - 2⁴ = 12317797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12317803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6158906 + 6158907.

It is an arithmetic number, because the mean of its divisors is an integer number (6158907).

Almost surely, 2^12317813 is an apocalyptic number.

It is an amenable number.

12317813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12317813 is an equidigital number, since it uses as much as digits as its factorization.

12317813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 12317813 is about 3509.6742014039. The cubic root of 12317813 is about 230.9464028623.

The spelling of 12317813 in words is "twelve million, three hundred seventeen thousand, eight hundred thirteen".