311743 has 2 divisors, whose sum is σ = 311744. Its totient is φ = 311742.

The previous prime is 311737. The next prime is 311747. The reversal of 311743 is 347113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311743 - 2⁵ = 311711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155871 + 155872.

It is an arithmetic number, because the mean of its divisors is an integer number (155872).

2³¹¹⁷⁴³ is an apocalyptic number.

311743 is a deficient number, since it is larger than the sum of its proper divisors (1).

311743 is an equidigital number, since it uses as much as digits as its factorization.

311743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 19.

The square root of 311743 is about 558.3395024535. The cubic root of 311743 is about 67.8056010664.

Adding to 311743 its reverse (347113), we get a palindrome (658856).

It can be divided in two parts, 3117 and 43, that added together give a triangular number (3160 = T₇₉).

The spelling of 311743 in words is "three hundred eleven thousand, seven hundred forty-three", and thus it is an iban number.