311373697 has 2 divisors, whose sum is σ = 311373698. Its totient is φ = 311373696.

The previous prime is 311373679. The next prime is 311373719. The reversal of 311373697 is 796373113.

Together with previous prime (311373679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290497936 + 20875761 = 17044^2 + 4569^2 .

It is an emirp because it is prime and its reverse (796373113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311373697 is a prime.

It is not a weakly prime, because it can be changed into another prime (311373617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155686848 + 155686849.

It is an arithmetic number, because the mean of its divisors is an integer number (155686849).

Almost surely, 2^311373697 is an apocalyptic number.

It is an amenable number.

311373697 is a deficient number, since it is larger than the sum of its proper divisors (1).

311373697 is an equidigital number, since it uses as much as digits as its factorization.

311373697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 40.

The square root of 311373697 is about 17645.7841140597. The cubic root of 311373697 is about 677.7881542729.

The spelling of 311373697 in words is "three hundred eleven million, three hundred seventy-three thousand, six hundred ninety-seven".