27929 has 4 divisors (see below), whose sum is σ = 30480. Its totient is φ = 25380.

The previous prime is 27919. The next prime is 27941. The reversal of 27929 is 92972.

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.

It is a cyclic number.

It is not a de Polignac number, because 27929 - 2⁸ = 27673 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (27919) 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, 1259 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (7620).

2²⁷⁹²⁹ is an apocalyptic number.

It is an amenable number.

27929 is a deficient number, since it is larger than the sum of its proper divisors (2551).

27929 is a wasteful number, since it uses less digits than its factorization.

27929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550.

The product of its digits is 2268, while the sum is 29.

The square root of 27929 is about 167.1197175680. The cubic root of 27929 is about 30.3402015871.

The spelling of 27929 in words is "twenty-seven thousand, nine hundred twenty-nine".