318347029813 has 4 divisors (see below), whose sum is σ = 318468678220. Its totient is φ = 318225381408.

The previous prime is 318347029799. The next prime is 318347029829. The reversal of 318347029813 is 318920743813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318920743813 = 7 ⋅45560106259.

It can be written as a sum of positive squares in 2 ways, for example, as 303035937169 + 15311092644 = 550487^2 + 123738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318347029813 is a prime.

It is a super-2 number, since 2×318347029813² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318347020813) 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, 60820278 + ... + 60825511.

It is an arithmetic number, because the mean of its divisors is an integer number (79617169555).

Almost surely, 2^318347029813 is an apocalyptic number.

It is an amenable number.

318347029813 is a deficient number, since it is larger than the sum of its proper divisors (121648407).

318347029813 is a wasteful number, since it uses less digits than its factorization.

318347029813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121648406.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 318347029813 in words is "three hundred eighteen billion, three hundred forty-seven million, twenty-nine thousand, eight hundred thirteen".