317240191 has 2 divisors, whose sum is σ = 317240192. Its totient is φ = 317240190.

The previous prime is 317240167. The next prime is 317240291. The reversal of 317240191 is 191042713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 317240191 - 2²¹ = 315143039 is a prime.

It is equal to p_17134426 and since 317240191 and 17134426 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317240101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158620095 + 158620096.

It is an arithmetic number, because the mean of its divisors is an integer number (158620096).

Almost surely, 2^317240191 is an apocalyptic number.

317240191 is a deficient number, since it is larger than the sum of its proper divisors (1).

317240191 is an equidigital number, since it uses as much as digits as its factorization.

317240191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 317240191 is about 17811.2377728220. The cubic root of 317240191 is about 682.0183623508.

The spelling of 317240191 in words is "three hundred seventeen million, two hundred forty thousand, one hundred ninety-one".