317240291 has 2 divisors, whose sum is σ = 317240292. Its totient is φ = 317240290.

The previous prime is 317240191. The next prime is 317240299. The reversal of 317240291 is 192042713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317240291 - 2¹⁸ = 316978147 is a prime.

It is a Chen prime.

It is equal to p_17134427 and since 317240291 and 17134427 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (317240299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158620145 + 158620146.

It is an arithmetic number, because the mean of its divisors is an integer number (158620146).

Almost surely, 2^317240291 is an apocalyptic number.

317240291 is a deficient number, since it is larger than the sum of its proper divisors (1).

317240291 is an equidigital number, since it uses as much as digits as its factorization.

317240291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 317240291 is about 17811.2405800382. The cubic root of 317240291 is about 682.0184340124.

The spelling of 317240291 in words is "three hundred seventeen million, two hundred forty thousand, two hundred ninety-one".