319861 has 4 divisors (see below), whose sum is σ = 333792. Its totient is φ = 305932.

The previous prime is 319849. The next prime is 319883. The reversal of 319861 is 168913.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 319861 - 2⁵ = 319829 is a prime.

It is a super-2 number, since 2×319861² = 204622118642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6931 + ... + 6976.

It is an arithmetic number, because the mean of its divisors is an integer number (83448).

2³¹⁹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

319861 is a deficient number, since it is larger than the sum of its proper divisors (13931).

319861 is a wasteful number, since it uses less digits than its factorization.

319861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930.

The product of its digits is 1296, while the sum is 28.

The square root of 319861 is about 565.5625518013. The cubic root of 319861 is about 68.3891328221.

The spelling of 319861 in words is "three hundred nineteen thousand, eight hundred sixty-one".