313499786993 has 2 divisors, whose sum is σ = 313499786994. Its totient is φ = 313499786992.

The previous prime is 313499786939. The next prime is 313499787011. The reversal of 313499786993 is 399687994313.

Together with previous prime (313499786939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228974691169 + 84525095824 = 478513^2 + 290732^2 .

It is a cyclic number.

It is not a de Polignac number, because 313499786993 - 2⁸ = 313499786737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (313499786923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156749893496 + 156749893497.

It is an arithmetic number, because the mean of its divisors is an integer number (156749893497).

Almost surely, 2^313499786993 is an apocalyptic number.

It is an amenable number.

313499786993 is a deficient number, since it is larger than the sum of its proper divisors (1).

313499786993 is an equidigital number, since it uses as much as digits as its factorization.

313499786993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238085568, while the sum is 71.

The spelling of 313499786993 in words is "three hundred thirteen billion, four hundred ninety-nine million, seven hundred eighty-six thousand, nine hundred ninety-three".