318613 has 4 divisors (see below), whose sum is σ = 325440. Its totient is φ = 311788.

The previous prime is 318601. The next prime is 318629. The reversal of 318613 is 316813.

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: 316813 = 7 ⋅45259.

It is a cyclic number.

It is not a de Polignac number, because 318613 - 2⁵ = 318581 is a prime.

It is a Duffinian number.

318613 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318653) 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, 3343 + ... + 3436.

It is an arithmetic number, because the mean of its divisors is an integer number (81360).

2³¹⁸⁶¹³ is an apocalyptic number.

It is an amenable number.

318613 is a deficient number, since it is larger than the sum of its proper divisors (6827).

318613 is an equidigital number, since it uses as much as digits as its factorization.

318613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6826.

The product of its digits is 432, while the sum is 22.

The square root of 318613 is about 564.4581472527. The cubic root of 318613 is about 68.3000723846.

The spelling of 318613 in words is "three hundred eighteen thousand, six hundred thirteen".