279791 has 4 divisors (see below), whose sum is σ = 285792. Its totient is φ = 273792.

The previous prime is 279779. The next prime is 279817. The reversal of 279791 is 197972.

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 279791 - 2¹⁰ = 278767 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12 and base 16.

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 279791.

It is not an unprimeable number, because it can be changed into a prime (279731) 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, 2930 + ... + 3023.

It is an arithmetic number, because the mean of its divisors is an integer number (71448).

2²⁷⁹⁷⁹¹ is an apocalyptic number.

279791 is a deficient number, since it is larger than the sum of its proper divisors (6001).

279791 is an equidigital number, since it uses as much as digits as its factorization.

279791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000.

The product of its digits is 7938, while the sum is 35.

The square root of 279791 is about 528.9527389096. The cubic root of 279791 is about 65.4050447031.

The spelling of 279791 in words is "two hundred seventy-nine thousand, seven hundred ninety-one".