279983 has 4 divisors (see below), whose sum is σ = 305448. Its totient is φ = 254520.

The previous prime is 279977. The next prime is 279991. The reversal of 279983 is 389972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 279983 - 2⁴ = 279967 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279913) 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, 12716 + ... + 12737.

It is an arithmetic number, because the mean of its divisors is an integer number (76362).

2²⁷⁹⁹⁸³ is an apocalyptic number.

279983 is a deficient number, since it is larger than the sum of its proper divisors (25465).

279983 is a wasteful number, since it uses less digits than its factorization.

279983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25464.

The product of its digits is 27216, while the sum is 38.

The square root of 279983 is about 529.1341984790. The cubic root of 279983 is about 65.4200021739.

It can be divided in two parts, 2799 and 83, that added together give a palindrome (2882).

The spelling of 279983 in words is "two hundred seventy-nine thousand, nine hundred eighty-three".