318137813 has 16 divisors (see below), whose sum is σ = 387016704. Its totient is φ = 255287040.

The previous prime is 318137777. The next prime is 318137849. The reversal of 318137813 is 318731813.

It is an interprime number because it is at equal distance from previous prime (318137777) and next prime (318137849).

It is a cyclic number.

It is not a de Polignac number, because 318137813 - 2¹⁰ = 318136789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318137873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15731 + ... + 29727.

It is an arithmetic number, because the mean of its divisors is an integer number (24188544).

Almost surely, 2^318137813 is an apocalyptic number.

It is an amenable number.

318137813 is a deficient number, since it is larger than the sum of its proper divisors (68878891).

318137813 is a wasteful number, since it uses less digits than its factorization.

318137813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212.

The product of its digits is 12096, while the sum is 35.

The square root of 318137813 is about 17836.4181662126. The cubic root of 318137813 is about 682.6610070660.

The spelling of 318137813 in words is "three hundred eighteen million, one hundred thirty-seven thousand, eight hundred thirteen".