317971961 has 6 divisors (see below), whose sum is σ = 337776750. Its totient is φ = 299267456.

The previous prime is 317971949. The next prime is 317972003. The reversal of 317971961 is 169179713.

It can be written as a sum of positive squares in 3 ways, for example, as 150528361 + 167443600 = 12269^2 + 12940^2 .

It is not a de Polignac number, because 317971961 - 2²² = 313777657 is a prime.

It is a super-2 number, since 2×317971961² = 202212335964371042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (317971361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549836 + ... + 550413.

It is an arithmetic number, because the mean of its divisors is an integer number (56296125).

Almost surely, 2^317971961 is an apocalyptic number.

It is an amenable number.

317971961 is a deficient number, since it is larger than the sum of its proper divisors (19804789).

317971961 is a wasteful number, since it uses less digits than its factorization.

317971961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100283 (or 1100266 counting only the distinct ones).

The product of its digits is 71442, while the sum is 44.

The square root of 317971961 is about 17831.7683082750. The cubic root of 317971961 is about 682.5423578840.

The spelling of 317971961 in words is "three hundred seventeen million, nine hundred seventy-one thousand, nine hundred sixty-one".