311682193 has 2 divisors, whose sum is σ = 311682194. Its totient is φ = 311682192.

The previous prime is 311682179. The next prime is 311682197. The reversal of 311682193 is 391286113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292820544 + 18861649 = 17112^2 + 4343^2 .

It is an emirp because it is prime and its reverse (391286113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311682193 is a prime.

It is not a weakly prime, because it can be changed into another prime (311682197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155841096 + 155841097.

It is an arithmetic number, because the mean of its divisors is an integer number (155841097).

Almost surely, 2^311682193 is an apocalyptic number.

It is an amenable number.

311682193 is a deficient number, since it is larger than the sum of its proper divisors (1).

311682193 is an equidigital number, since it uses as much as digits as its factorization.

311682193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 311682193 is about 17654.5233014092. The cubic root of 311682193 is about 678.0119217484.

The spelling of 311682193 in words is "three hundred eleven million, six hundred eighty-two thousand, one hundred ninety-three".