27957 has 4 divisors (see below), whose sum is σ = 37280. Its totient is φ = 18636.

The previous prime is 27953. The next prime is 27961. The reversal of 27957 is 75972.

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 an interprime number because it is at equal distance from previous prime (27953) and next prime (27961).

It is not a de Polignac number, because 27957 - 2² = 27953 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27953) 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, 4657 + ... + 4662.

It is an arithmetic number, because the mean of its divisors is an integer number (9320).

2²⁷⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

27957 is a deficient number, since it is larger than the sum of its proper divisors (9323).

27957 is an equidigital number, since it uses as much as digits as its factorization.

27957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9322.

The product of its digits is 4410, while the sum is 30.

The square root of 27957 is about 167.2034688635. The cubic root of 27957 is about 30.3503373111.

The spelling of 27957 in words is "twenty-seven thousand, nine hundred fifty-seven".