55659 has 4 divisors (see below), whose sum is σ = 74216. Its totient is φ = 37104.

The previous prime is 55639. The next prime is 55661. The reversal of 55659 is 95655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55659 - 2⁹ = 55147 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (55609) 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, 9274 + ... + 9279.

It is an arithmetic number, because the mean of its divisors is an integer number (18554).

2⁵⁵⁶⁵⁹ is an apocalyptic number.

55659 is a deficient number, since it is larger than the sum of its proper divisors (18557).

55659 is a wasteful number, since it uses less digits than its factorization.

55659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18556.

The product of its digits is 6750, while the sum is 30.

The square root of 55659 is about 235.9215971462. The cubic root of 55659 is about 38.1808096002.

The spelling of 55659 in words is "fifty-five thousand, six hundred fifty-nine".