318113 has 4 divisors (see below), whose sum is σ = 331968. Its totient is φ = 304260.

The previous prime is 318107. The next prime is 318127. The reversal of 318113 is 311813.

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: 311813 = 79 ⋅3947.

It is a cyclic number.

It is not a de Polignac number, because 318113 - 2⁸ = 317857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318091 and 318100.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318113.

It is not an unprimeable number, because it can be changed into a prime (318103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6893 + ... + 6938.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2³¹⁸¹¹³ is an apocalyptic number.

It is an amenable number.

318113 is a deficient number, since it is larger than the sum of its proper divisors (13855).

318113 is a wasteful number, since it uses less digits than its factorization.

318113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854.

The product of its digits is 72, while the sum is 17.

The square root of 318113 is about 564.0150707206. The cubic root of 318113 is about 68.2643258670.

Subtracting from 318113 its sum of digits (17), we obtain a square (318096 = 564²).

Adding to 318113 its reverse (311813), we get a palindrome (629926).

The spelling of 318113 in words is "three hundred eighteen thousand, one hundred thirteen".