318073313 has 4 divisors (see below), whose sum is σ = 318115860. Its totient is φ = 318030768.

The previous prime is 318073309. The next prime is 318073331. The reversal of 318073313 is 313370813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313370813 = 7 ⋅44767259.

It can be written as a sum of positive squares in 2 ways, for example, as 200307409 + 117765904 = 14153^2 + 10852^2 .

It is a cyclic number.

It is not a de Polignac number, because 318073313 - 2² = 318073309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318063313) 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, 6758 + ... + 26111.

It is an arithmetic number, because the mean of its divisors is an integer number (79528965).

Almost surely, 2^318073313 is an apocalyptic number.

It is an amenable number.

318073313 is a deficient number, since it is larger than the sum of its proper divisors (42547).

318073313 is an equidigital number, since it uses as much as digits as its factorization.

318073313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42546.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 318073313 is about 17834.6099761111. The cubic root of 318073313 is about 682.6148691878.

The spelling of 318073313 in words is "three hundred eighteen million, seventy-three thousand, three hundred thirteen".