318364681 has 4 divisors (see below), whose sum is σ = 318425364. Its totient is φ = 318304000.

The previous prime is 318364667. The next prime is 318364747. The reversal of 318364681 is 186463813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186463813 = 127 ⋅1468219.

It can be written as a sum of positive squares in 2 ways, for example, as 175801081 + 142563600 = 13259^2 + 11940^2 .

It is a cyclic number.

It is not a de Polignac number, because 318364681 - 2²¹ = 316267529 is a prime.

It is a super-2 number, since 2×318364681² = 202712140216463522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318364601) 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, 21640 + ... + 33241.

It is an arithmetic number, because the mean of its divisors is an integer number (79606341).

Almost surely, 2^318364681 is an apocalyptic number.

It is an amenable number.

318364681 is a deficient number, since it is larger than the sum of its proper divisors (60683).

318364681 is an equidigital number, since it uses as much as digits as its factorization.

318364681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60682.

The product of its digits is 82944, while the sum is 40.

The square root of 318364681 is about 17842.7767177645. The cubic root of 318364681 is about 682.8232398379.

The spelling of 318364681 in words is "three hundred eighteen million, three hundred sixty-four thousand, six hundred eighty-one".