27769 has 4 divisors (see below), whose sum is σ = 31744. Its totient is φ = 23796.

The previous prime is 27767. The next prime is 27773. The reversal of 27769 is 96772.

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 27769 - 2¹ = 27767 is a prime.

It is a super-2 number, since 2×27769² = 1542234722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 27769.

It is not an unprimeable number, because it can be changed into a prime (27763) 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, 1977 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (7936).

2²⁷⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

27769 is a deficient number, since it is larger than the sum of its proper divisors (3975).

27769 is an equidigital number, since it uses as much as digits as its factorization.

27769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974.

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

The square root of 27769 is about 166.6403312527. The cubic root of 27769 is about 30.2821528216.

The spelling of 27769 in words is "twenty-seven thousand, seven hundred sixty-nine".