318889 has 2 divisors, whose sum is σ = 318890. Its totient is φ = 318888.

The previous prime is 318883. The next prime is 318907. The reversal of 318889 is 988813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 43264 = 525^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 318889 - 2³ = 318881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318881) 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 as a sum of consecutive naturals, namely, 159444 + 159445.

It is an arithmetic number, because the mean of its divisors is an integer number (159445).

2³¹⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

318889 is a deficient number, since it is larger than the sum of its proper divisors (1).

318889 is an equidigital number, since it uses as much as digits as its factorization.

318889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 318889 is about 564.7025765835. The cubic root of 318889 is about 68.3197884450.

The spelling of 318889 in words is "three hundred eighteen thousand, eight hundred eighty-nine".