318779 has 4 divisors (see below), whose sum is σ = 320640. Its totient is φ = 316920.

The previous prime is 318751. The next prime is 318781. The reversal of 318779 is 977813.

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

It is a cyclic number.

It is not a de Polignac number, because 318779 - 2⁸ = 318523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (318749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (80160).

2³¹⁸⁷⁷⁹ is an apocalyptic number.

318779 is a deficient number, since it is larger than the sum of its proper divisors (1861).

318779 is a wasteful number, since it uses less digits than its factorization.

318779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860.

The product of its digits is 10584, while the sum is 35.

The square root of 318779 is about 564.6051717794. The cubic root of 318779 is about 68.3119319588.

The spelling of 318779 in words is "three hundred eighteen thousand, seven hundred seventy-nine".