439

439 is a prime number.

439 is the sum of three consecutive primes (439 = 139 + 149 + 151) and the sum of nine consecutive primes (439 = 31 + 37 + 41 + 43 + 47 + 53 + 59 + 61 + 67).

439 is a number that can be expressed as the signed sum of cubes in at least three ways: 439 = 264488³ + 331574³ - 380193³ = 2322404³ - 869418³ - 2281057³ = 402906³ - 211402³ - 382489³.

439 is the smallest prime such that another prime is never produced by inserting the same digit between each pair of its digits: 40309, 41319, 42329, . . . 49399 are all composite.

439 is a number that cannot be written as a sum of three squares.

439 Ohio is a main-belt asteroid discovered in 1898.

Source: Prime Curios!