319891 has 8 divisors (see below), whose sum is σ = 375984. Its totient is φ = 268320.

The previous prime is 319883. The next prime is 319897. The reversal of 319891 is 198913.

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

It is not a de Polignac number, because 319891 - 2³ = 319883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319897) 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, 976 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (46998).

2³¹⁹⁸⁹¹ is an apocalyptic number.

319891 is a deficient number, since it is larger than the sum of its proper divisors (56093).

319891 is a wasteful number, since it uses less digits than its factorization.

319891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261.

The product of its digits is 1944, while the sum is 31.

The square root of 319891 is about 565.5890734447. The cubic root of 319891 is about 68.3912708444.

The spelling of 319891 in words is "three hundred nineteen thousand, eight hundred ninety-one".