318918361 has 4 divisors (see below), whose sum is σ = 318978000. Its totient is φ = 318858724.

The previous prime is 318918343. The next prime is 318918373. The reversal of 318918361 is 163819813.

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.

It is a cyclic number.

It is not a de Polignac number, because 318918361 - 2⁵ = 318918329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318918311) 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, 20911 + ... + 32788.

It is an arithmetic number, because the mean of its divisors is an integer number (79744500).

Almost surely, 2^318918361 is an apocalyptic number.

It is an amenable number.

318918361 is a deficient number, since it is larger than the sum of its proper divisors (59639).

318918361 is an equidigital number, since it uses as much as digits as its factorization.

318918361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59638.

The product of its digits is 31104, while the sum is 40.

The square root of 318918361 is about 17858.2855000137. The cubic root of 318918361 is about 683.2188517846.

The spelling of 318918361 in words is "three hundred eighteen million, nine hundred eighteen thousand, three hundred sixty-one".