317921371 has 2 divisors, whose sum is σ = 317921372. Its totient is φ = 317921370.

The previous prime is 317921327. The next prime is 317921393. The reversal of 317921371 is 173129713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317921371 - 2¹³ = 317913179 is a prime.

It is equal to p_17169217 and since 317921371 and 17169217 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 (317921311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158960685 + 158960686.

It is an arithmetic number, because the mean of its divisors is an integer number (158960686).

Almost surely, 2^317921371 is an apocalyptic number.

317921371 is a deficient number, since it is larger than the sum of its proper divisors (1).

317921371 is an equidigital number, since it uses as much as digits as its factorization.

317921371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 34.

The square root of 317921371 is about 17830.3497161441. The cubic root of 317921371 is about 682.5061579948.

The spelling of 317921371 in words is "three hundred seventeen million, nine hundred twenty-one thousand, three hundred seventy-one".