55699 has 8 divisors (see below), whose sum is σ = 65120. Its totient is φ = 46656.

The previous prime is 55697. The next prime is 55711. The reversal of 55699 is 99655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 6-Lehmer number, since φ(55699) divides (55699-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 55699 - 2¹ = 55697 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 (55691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (8140).

2⁵⁵⁶⁹⁹ is an apocalyptic number.

55699 is a deficient number, since it is larger than the sum of its proper divisors (9421).

55699 is a wasteful number, since it uses less digits than its factorization.

55699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189.

The product of its digits is 12150, while the sum is 34.

The square root of 55699 is about 236.0063558466. The cubic root of 55699 is about 38.1899537738.

Subtracting 55699 from its reverse (99655), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 55699 in words is "fifty-five thousand, six hundred ninety-nine".