318914621 has 4 divisors (see below), whose sum is σ = 324931932. Its totient is φ = 312897312.

The previous prime is 318914597. The next prime is 318914689. The reversal of 318914621 is 126419813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126419813 = 13 ⋅9724601.

It can be written as a sum of positive squares in 2 ways, for example, as 218714521 + 100200100 = 14789^2 + 10010^2 .

It is a cyclic number.

It is not a de Polignac number, because 318914621 - 2²² = 314720317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318914521) 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, 3008576 + ... + 3008681.

It is an arithmetic number, because the mean of its divisors is an integer number (81232983).

Almost surely, 2^318914621 is an apocalyptic number.

It is an amenable number.

318914621 is a deficient number, since it is larger than the sum of its proper divisors (6017311).

318914621 is an equidigital number, since it uses as much as digits as its factorization.

318914621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017310.

The product of its digits is 10368, while the sum is 35.

The square root of 318914621 is about 17858.1807864071. The cubic root of 318914621 is about 683.2161810399.

The spelling of 318914621 in words is "three hundred eighteen million, nine hundred fourteen thousand, six hundred twenty-one".