317661321 has 4 divisors (see below), whose sum is σ = 423548432. Its totient is φ = 211774212.

The previous prime is 317661319. The next prime is 317661359. The reversal of 317661321 is 123166713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123166713 = 3 ⋅41055571.

It is not a de Polignac number, because 317661321 - 2¹ = 317661319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317662321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52943551 + ... + 52943556.

It is an arithmetic number, because the mean of its divisors is an integer number (105887108).

Almost surely, 2^317661321 is an apocalyptic number.

It is an amenable number.

317661321 is a deficient number, since it is larger than the sum of its proper divisors (105887111).

317661321 is a wasteful number, since it uses less digits than its factorization.

317661321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105887110.

The product of its digits is 4536, while the sum is 30.

The square root of 317661321 is about 17823.0558827604. The cubic root of 317661321 is about 682.3200174820.

The spelling of 317661321 in words is "three hundred seventeen million, six hundred sixty-one thousand, three hundred twenty-one".