318819133 has 2 divisors, whose sum is σ = 318819134. Its totient is φ = 318819132.

The previous prime is 318819131. The next prime is 318819167. The reversal of 318819133 is 331918813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299220804 + 19598329 = 17298^2 + 4427^2 .

It is a cyclic number.

It is not a de Polignac number, because 318819133 - 2¹ = 318819131 is a prime.

Together with 318819131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 318819092 and 318819101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318819131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159409566 + 159409567.

It is an arithmetic number, because the mean of its divisors is an integer number (159409567).

Almost surely, 2^318819133 is an apocalyptic number.

It is an amenable number.

318819133 is a deficient number, since it is larger than the sum of its proper divisors (1).

318819133 is an equidigital number, since it uses as much as digits as its factorization.

318819133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 318819133 is about 17855.5070776497. The cubic root of 318819133 is about 683.1479857147.

It can be divided in two parts, 31881 and 9133, that added together give a palindrome (41014).

The spelling of 318819133 in words is "three hundred eighteen million, eight hundred nineteen thousand, one hundred thirty-three".