311323717 has 2 divisors, whose sum is σ = 311323718. Its totient is φ = 311323716.

The previous prime is 311323709. The next prime is 311323739. The reversal of 311323717 is 717323113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190191681 + 121132036 = 13791^2 + 11006^2 .

It is a cyclic number.

It is not a de Polignac number, because 311323717 - 2³ = 311323709 is a prime.

It is equal to p_16832071 and since 311323717 and 16832071 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311327717) 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, 155661858 + 155661859.

It is an arithmetic number, because the mean of its divisors is an integer number (155661859).

Almost surely, 2^311323717 is an apocalyptic number.

It is an amenable number.

311323717 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323717 is an equidigital number, since it uses as much as digits as its factorization.

311323717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 28.

The square root of 311323717 is about 17644.3678549275. The cubic root of 311323717 is about 677.7518873853.

The spelling of 311323717 in words is "three hundred eleven million, three hundred twenty-three thousand, seven hundred seventeen".