317123111 has 2 divisors, whose sum is σ = 317123112. Its totient is φ = 317123110.

The previous prime is 317123089. The next prime is 317123113. The reversal of 317123111 is 111321713.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317123111 is a prime.

Together with 317123113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317123113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158561555 + 158561556.

It is an arithmetic number, because the mean of its divisors is an integer number (158561556).

Almost surely, 2^317123111 is an apocalyptic number.

317123111 is a deficient number, since it is larger than the sum of its proper divisors (1).

317123111 is an equidigital number, since it uses as much as digits as its factorization.

317123111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126, while the sum is 20.

The square root of 317123111 is about 17807.9507804800. The cubic root of 317123111 is about 681.9344506047.

Adding to 317123111 its reverse (111321713), we get a palindrome (428444824).

The spelling of 317123111 in words is "three hundred seventeen million, one hundred twenty-three thousand, one hundred eleven".