318946 has 4 divisors (see below), whose sum is σ = 478422. Its totient is φ = 159472.

The previous prime is 318919. The next prime is 318949. The reversal of 318946 is 649813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 314721 + 4225 = 561^2 + 65^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (318949) by changing a digit.

318946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79735 + ... + 79738.

2³¹⁸⁹⁴⁶ is an apocalyptic number.

318946 is a deficient number, since it is larger than the sum of its proper divisors (159476).

318946 is a wasteful number, since it uses less digits than its factorization.

318946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159475.

The product of its digits is 5184, while the sum is 31.

The square root of 318946 is about 564.7530433738. The cubic root of 318946 is about 68.3238588226.

The spelling of 318946 in words is "three hundred eighteen thousand, nine hundred forty-six".