317085121 has 2 divisors, whose sum is σ = 317085122. Its totient is φ = 317085120.

The previous prime is 317085047. The next prime is 317085127. The reversal of 317085121 is 121580713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248377600 + 68707521 = 15760^2 + 8289^2 .

It is a cyclic number.

It is not a de Polignac number, because 317085121 - 2⁹ = 317084609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317085121.

It is not a weakly prime, because it can be changed into another prime (317085127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158542560 + 158542561.

It is an arithmetic number, because the mean of its divisors is an integer number (158542561).

Almost surely, 2^317085121 is an apocalyptic number.

It is an amenable number.

317085121 is a deficient number, since it is larger than the sum of its proper divisors (1).

317085121 is an equidigital number, since it uses as much as digits as its factorization.

317085121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 317085121 is about 17806.8840901490. The cubic root of 317085121 is about 681.9072185683.

It can be divided in two parts, 317085 and 121, that added together give a triangular number (317206 = T₇₉₆).

The spelling of 317085121 in words is "three hundred seventeen million, eighty-five thousand, one hundred twenty-one".