319989 has 4 divisors (see below), whose sum is σ = 426656. Its totient is φ = 213324.

The previous prime is 319981. The next prime is 319993. The reversal of 319989 is 989913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 319989 - 2³ = 319981 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 319989.

It is not an unprimeable number, because it can be changed into a prime (319981) 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 in 3 ways as a sum of consecutive naturals, for example, 53329 + ... + 53334.

It is an arithmetic number, because the mean of its divisors is an integer number (106664).

2³¹⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

319989 is a deficient number, since it is larger than the sum of its proper divisors (106667).

319989 is a wasteful number, since it uses less digits than its factorization.

319989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106666.

The product of its digits is 17496, while the sum is 39.

The square root of 319989 is about 565.6757021474. The cubic root of 319989 is about 68.3982541191.

The spelling of 319989 in words is "three hundred nineteen thousand, nine hundred eighty-nine".