313698581993 has 2 divisors, whose sum is σ = 313698581994. Its totient is φ = 313698581992.

The previous prime is 313698581909. The next prime is 313698582017. The reversal of 313698581993 is 399185896313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158783919529 + 154914662464 = 398477^2 + 393592^2 .

It is an emirp because it is prime and its reverse (399185896313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313698581993 - 2¹⁰ = 313698580969 is a prime.

It is not a weakly prime, because it can be changed into another prime (313698581893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156849290996 + 156849290997.

It is an arithmetic number, because the mean of its divisors is an integer number (156849290997).

Almost surely, 2^313698581993 is an apocalyptic number.

It is an amenable number.

313698581993 is a deficient number, since it is larger than the sum of its proper divisors (1).

313698581993 is an equidigital number, since it uses as much as digits as its factorization.

313698581993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37791360, while the sum is 65.

The spelling of 313698581993 in words is "three hundred thirteen billion, six hundred ninety-eight million, five hundred eighty-one thousand, nine hundred ninety-three".