313743809861 has 2 divisors, whose sum is σ = 313743809862. Its totient is φ = 313743809860.

The previous prime is 313743809839. The next prime is 313743809879. The reversal of 313743809861 is 168908347313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213060712225 + 100683097636 = 461585^2 + 317306^2 .

It is an emirp because it is prime and its reverse (168908347313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313743809861 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 (313743809161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156871904930 + 156871904931.

It is an arithmetic number, because the mean of its divisors is an integer number (156871904931).

Almost surely, 2^313743809861 is an apocalyptic number.

It is an amenable number.

313743809861 is a deficient number, since it is larger than the sum of its proper divisors (1).

313743809861 is an equidigital number, since it uses as much as digits as its factorization.

313743809861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 313743809861 in words is "three hundred thirteen billion, seven hundred forty-three million, eight hundred nine thousand, eight hundred sixty-one".