318665 has 16 divisors (see below), whose sum is σ = 425088. Its totient is φ = 228096.

The previous prime is 318653. The next prime is 318671. The reversal of 318665 is 566813.

It is a cyclic number.

It is not a de Polignac number, because 318665 - 2⁶ = 318601 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874 + ... + 2036.

It is an arithmetic number, because the mean of its divisors is an integer number (26568).

2³¹⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

318665 is a deficient number, since it is larger than the sum of its proper divisors (106423).

318665 is a wasteful number, since it uses less digits than its factorization.

318665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208.

The product of its digits is 4320, while the sum is 29.

The square root of 318665 is about 564.5042072474. The cubic root of 318665 is about 68.3037878750.

It can be divided in two parts, 31866 and 5, that multiplied together give a triangular number (159330 = T₅₆₄).

The spelling of 318665 in words is "three hundred eighteen thousand, six hundred sixty-five".