318493 has 8 divisors (see below), whose sum is σ = 367488. Its totient is φ = 270384.

The previous prime is 318473. The next prime is 318503. The reversal of 318493 is 394813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318493 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 (318403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 1342.

It is an arithmetic number, because the mean of its divisors is an integer number (45936).

2³¹⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

318493 is a deficient number, since it is larger than the sum of its proper divisors (48995).

318493 is a wasteful number, since it uses less digits than its factorization.

318493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its digits is 2592, while the sum is 28.

The square root of 318493 is about 564.3518406101. The cubic root of 318493 is about 68.2914966330.

It can be divided in two parts, 3 and 18493, that added together give a square (18496 = 136²).

The spelling of 318493 in words is "three hundred eighteen thousand, four hundred ninety-three".