313320316993 has 2 divisors, whose sum is σ = 313320316994. Its totient is φ = 313320316992.

The previous prime is 313320316961. The next prime is 313320316997. The reversal of 313320316993 is 399613023313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157241592369 + 156078724624 = 396537^2 + 395068^2 .

It is a cyclic number.

It is not a de Polignac number, because 313320316993 - 2⁵ = 313320316961 is a prime.

It is not a weakly prime, because it can be changed into another prime (313320316997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156660158496 + 156660158497.

It is an arithmetic number, because the mean of its divisors is an integer number (156660158497).

Almost surely, 2^313320316993 is an apocalyptic number.

It is an amenable number.

313320316993 is a deficient number, since it is larger than the sum of its proper divisors (1).

313320316993 is an equidigital number, since it uses as much as digits as its factorization.

313320316993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 43.

The spelling of 313320316993 in words is "three hundred thirteen billion, three hundred twenty million, three hundred sixteen thousand, nine hundred ninety-three".