319997 has 4 divisors (see below), whose sum is σ = 324576. Its totient is φ = 315420.

The previous prime is 319993. The next prime is 320009. The reversal of 319997 is 799913.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799913 = 67 ⋅11939.

It is a cyclic number.

It is not a de Polignac number, because 319997 - 2² = 319993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 319997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319993) 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, 2183 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (81144).

2³¹⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

319997 is a deficient number, since it is larger than the sum of its proper divisors (4579).

319997 is an equidigital number, since it uses as much as digits as its factorization.

319997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578.

The product of its digits is 15309, while the sum is 38.

The square root of 319997 is about 565.6827732926. The cubic root of 319997 is about 68.3988241194.

The spelling of 319997 in words is "three hundred nineteen thousand, nine hundred ninety-seven".