311728741 has 2 divisors, whose sum is σ = 311728742. Its totient is φ = 311728740.

The previous prime is 311728709. The next prime is 311728751. The reversal of 311728741 is 147827113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311663716 + 65025 = 17654^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 311728741 - 2⁵ = 311728709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311728697 and 311728706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311728751) 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, 155864370 + 155864371.

It is an arithmetic number, because the mean of its divisors is an integer number (155864371).

Almost surely, 2^311728741 is an apocalyptic number.

It is an amenable number.

311728741 is a deficient number, since it is larger than the sum of its proper divisors (1).

311728741 is an equidigital number, since it uses as much as digits as its factorization.

311728741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 311728741 is about 17655.8415545677. The cubic root of 311728741 is about 678.0456725033.

The spelling of 311728741 in words is "three hundred eleven million, seven hundred twenty-eight thousand, seven hundred forty-one".