318989 has 8 divisors (see below), whose sum is σ = 355968. Its totient is φ = 283360.

The previous prime is 318979. The next prime is 319001. The reversal of 318989 is 989813.

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

It is a de Polignac number, because none of the positive numbers 2^k-318989 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 (318919) 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, 209 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (44496).

2³¹⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

318989 is a deficient number, since it is larger than the sum of its proper divisors (36979).

318989 is a wasteful number, since it uses less digits than its factorization.

318989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its digits is 15552, while the sum is 38.

The square root of 318989 is about 564.7911118281. The cubic root of 318989 is about 68.3269291374.

The spelling of 318989 in words is "three hundred eighteen thousand, nine hundred eighty-nine".