318311389 has 24 divisors (see below), whose sum is σ = 371977920. Its totient is φ = 270043200.

The previous prime is 318311347. The next prime is 318311393. The reversal of 318311389 is 983113813.

It is a happy number.

It is not a de Polignac number, because 318311389 - 2¹⁹ = 317787101 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 (318311339) 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 23 ways as a sum of consecutive naturals, for example, 281377 + ... + 282505.

It is an arithmetic number, because the mean of its divisors is an integer number (15499080).

Almost surely, 2^318311389 is an apocalyptic number.

It is an amenable number.

318311389 is a deficient number, since it is larger than the sum of its proper divisors (53666531).

318311389 is a wasteful number, since it uses less digits than its factorization.

318311389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1230 counting only the distinct ones).

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

The square root of 318311389 is about 17841.2832778363. The cubic root of 318311389 is about 682.7851377819.

The spelling of 318311389 in words is "three hundred eighteen million, three hundred eleven thousand, three hundred eighty-nine".