311293 has 2 divisors, whose sum is σ = 311294. Its totient is φ = 311292.

The previous prime is 311291. The next prime is 311299. The reversal of 311293 is 392113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272484 + 38809 = 522^2 + 197^2 .

It is an emirp because it is prime and its reverse (392113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311293 - 2¹ = 311291 is a prime.

Together with 311291, it forms a pair of twin primes.

311293 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 311293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155646 + 155647.

It is an arithmetic number, because the mean of its divisors is an integer number (155647).

2³¹¹²⁹³ is an apocalyptic number.

It is an amenable number.

311293 is a deficient number, since it is larger than the sum of its proper divisors (1).

311293 is an equidigital number, since it uses as much as digits as its factorization.

311293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 19.

The square root of 311293 is about 557.9363763011. The cubic root of 311293 is about 67.7729596344.

The spelling of 311293 in words is "three hundred eleven thousand, two hundred ninety-three".