55969 has 4 divisors (see below), whose sum is σ = 56644. Its totient is φ = 55296.

The previous prime is 55967. The next prime is 55987. The reversal of 55969 is 96955.

55969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96955 = 5 ⋅19391.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 11025 = 212^2 + 105^2 .

It is a 3-Lehmer number, since φ(55969) divides (55969-1)³.

It is a cyclic number.

It is not a de Polignac number, because 55969 - 2¹ = 55967 is a prime.

It is a super-2 number, since 2×55969² = 6265057922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (55967) 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, 192 + ... + 385.

It is an arithmetic number, because the mean of its divisors is an integer number (14161).

2⁵⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

55969 is a deficient number, since it is larger than the sum of its proper divisors (675).

55969 is an equidigital number, since it uses as much as digits as its factorization.

55969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674.

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

The square root of 55969 is about 236.5776828021. The cubic root of 55969 is about 38.2515627254.

It can be divided in two parts, 55 and 969, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 55969 in words is "fifty-five thousand, nine hundred sixty-nine".