318819 has 4 divisors (see below), whose sum is σ = 425096. Its totient is φ = 212544.

The previous prime is 318817. The next prime is 318823. The reversal of 318819 is 918813.

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

It is not a de Polignac number, because 318819 - 2¹ = 318817 is a prime.

It is a super-2 number, since 2×318819² = 203291109522, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318811) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 53134 + ... + 53139.

It is an arithmetic number, because the mean of its divisors is an integer number (106274).

2³¹⁸⁸¹⁹ is an apocalyptic number.

318819 is a deficient number, since it is larger than the sum of its proper divisors (106277).

318819 is a wasteful number, since it uses less digits than its factorization.

318819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106276.

The product of its digits is 1728, while the sum is 30.

The square root of 318819 is about 564.6405936523. The cubic root of 318819 is about 68.3147890720.

The spelling of 318819 in words is "three hundred eighteen thousand, eight hundred nineteen".