56689 has 4 divisors (see below), whose sum is σ = 57456. Its totient is φ = 55924.

The previous prime is 56687. The next prime is 56701. The reversal of 56689 is 98665.

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 56689 - 2¹ = 56687 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (56681) 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, 259 + ... + 424.

It is an arithmetic number, because the mean of its divisors is an integer number (14364).

2⁵⁶⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

56689 is a deficient number, since it is larger than the sum of its proper divisors (767).

56689 is an equidigital number, since it uses as much as digits as its factorization.

56689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its digits is 12960, while the sum is 34.

The square root of 56689 is about 238.0945190465. The cubic root of 56689 is about 38.4148904202.

The spelling of 56689 in words is "fifty-six thousand, six hundred eighty-nine".