313085813 has 2 divisors, whose sum is σ = 313085814. Its totient is φ = 313085812.

The previous prime is 313085807. The next prime is 313085873. The reversal of 313085813 is 318580313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239692324 + 73393489 = 15482^2 + 8567^2 .

It is an emirp because it is prime and its reverse (318580313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313085813 - 2²⁰ = 312037237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313085813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313085873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156542906 + 156542907.

It is an arithmetic number, because the mean of its divisors is an integer number (156542907).

Almost surely, 2^313085813 is an apocalyptic number.

It is an amenable number.

313085813 is a deficient number, since it is larger than the sum of its proper divisors (1).

313085813 is an equidigital number, since it uses as much as digits as its factorization.

313085813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 313085813 is about 17694.2310655196. The cubic root of 313085813 is about 679.0281770911.

The spelling of 313085813 in words is "three hundred thirteen million, eighty-five thousand, eight hundred thirteen".