318450689 has 4 divisors (see below), whose sum is σ = 318487620. Its totient is φ = 318413760.

The previous prime is 318450679. The next prime is 318450703. The reversal of 318450689 is 986054813.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 986054813 = 61 ⋅16164833.

It can be written as a sum of positive squares in 2 ways, for example, as 150307600 + 168143089 = 12260^2 + 12967^2 .

It is a cyclic number.

It is not a de Polignac number, because 318450689 - 2⁴ = 318450673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318450679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117 + ... + 25325.

It is an arithmetic number, because the mean of its divisors is an integer number (79621905).

Almost surely, 2^318450689 is an apocalyptic number.

It is an amenable number.

318450689 is a deficient number, since it is larger than the sum of its proper divisors (36931).

318450689 is a wasteful number, since it uses less digits than its factorization.

318450689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36930.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 318450689 is about 17845.1867179921. The cubic root of 318450689 is about 682.8847238078.

The spelling of 318450689 in words is "three hundred eighteen million, four hundred fifty thousand, six hundred eighty-nine".