313666313 has 4 divisors (see below), whose sum is σ = 314141508. Its totient is φ = 313191120.

The previous prime is 313666271. The next prime is 313666343.

313666313 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271195024 + 42471289 = 16468^2 + 6517^2 .

It is a cyclic number.

It is not a de Polignac number, because 313666313 - 2²⁴ = 296889097 is a prime.

It is a super-2 number, since 2×313666313² = 196773111822027938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 313666313.

It is not an unprimeable number, because it can be changed into a prime (313666343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236606 + ... + 237927.

It is an arithmetic number, because the mean of its divisors is an integer number (78535377).

Almost surely, 2^313666313 is an apocalyptic number.

It is an amenable number.

313666313 is a deficient number, since it is larger than the sum of its proper divisors (475195).

313666313 is an equidigital number, since it uses as much as digits as its factorization.

313666313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475194.

The product of its digits is 17496, while the sum is 32.

The square root of 313666313 is about 17710.6271204608. The cubic root of 313666313 is about 679.4475855238.

The spelling of 313666313 in words is "three hundred thirteen million, six hundred sixty-six thousand, three hundred thirteen".