27679 has 4 divisors (see below), whose sum is σ = 28080. Its totient is φ = 27280.

The previous prime is 27673. The next prime is 27689. The reversal of 27679 is 97672.

It is a happy number.

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 27679 - 2⁵ = 27647 is a prime.

It is a super-2 number, since 2×27679² = 1532254082, which contains 22 as substring.

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 27679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27673) 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, 67 + ... + 244.

It is an arithmetic number, because the mean of its divisors is an integer number (7020).

2²⁷⁶⁷⁹ is an apocalyptic number.

27679 is a deficient number, since it is larger than the sum of its proper divisors (401).

27679 is an equidigital number, since it uses as much as digits as its factorization.

27679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400.

The product of its digits is 5292, while the sum is 31.

The square root of 27679 is about 166.3700694236. The cubic root of 27679 is about 30.2494023514.

The spelling of 27679 in words is "twenty-seven thousand, six hundred seventy-nine".