318621449 has 4 divisors (see below), whose sum is σ = 319476036. Its totient is φ = 317766864.

The previous prime is 318621439. The next prime is 318621473. The reversal of 318621449 is 944126813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80227849 + 238393600 = 8957^2 + 15440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318621449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318621419) 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, 426734 + ... + 427479.

It is an arithmetic number, because the mean of its divisors is an integer number (79869009).

Almost surely, 2^318621449 is an apocalyptic number.

It is an amenable number.

318621449 is a deficient number, since it is larger than the sum of its proper divisors (854587).

318621449 is an equidigital number, since it uses as much as digits as its factorization.

318621449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854586.

The product of its digits is 41472, while the sum is 38.

The square root of 318621449 is about 17849.9705601998. The cubic root of 318621449 is about 683.0067610786.

The spelling of 318621449 in words is "three hundred eighteen million, six hundred twenty-one thousand, four hundred forty-nine".