317918 has 4 divisors (see below), whose sum is σ = 476880. Its totient is φ = 158958.

The previous prime is 317903. The next prime is 317921. The reversal of 317918 is 819713.

317918 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 819713 = 41 ⋅19993.

It is a super-4 number, since 4×317918⁴ (a number of 23 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 317918.

It is an unprimeable number.

317918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79478 + ... + 79481.

It is an arithmetic number, because the mean of its divisors is an integer number (119220).

2³¹⁷⁹¹⁸ is an apocalyptic number.

317918 is a deficient number, since it is larger than the sum of its proper divisors (158962).

317918 is a wasteful number, since it uses less digits than its factorization.

317918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158961.

The product of its digits is 1512, while the sum is 29.

The square root of 317918 is about 563.8421764998. The cubic root of 317918 is about 68.2503745725.

The spelling of 317918 in words is "three hundred seventeen thousand, nine hundred eighteen".