320279 has 4 divisors (see below), whose sum is σ = 326376. Its totient is φ = 314184.

The previous prime is 320273. The next prime is 320291. The reversal of 320279 is 972023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972023 = 13 ⋅74771.

It is a de Polignac number, because none of the positive numbers 2^k-320279 is a prime.

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 320279.

It is not an unprimeable number, because it can be changed into a prime (320273) 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, 2969 + ... + 3074.

It is an arithmetic number, because the mean of its divisors is an integer number (81594).

2³²⁰²⁷⁹ is an apocalyptic number.

320279 is a deficient number, since it is larger than the sum of its proper divisors (6097).

320279 is an equidigital number, since it uses as much as digits as its factorization.

320279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 320279 is about 565.9319747107. The cubic root of 320279 is about 68.4189105631.

The spelling of 320279 in words is "three hundred twenty thousand, two hundred seventy-nine".