54109 has 4 divisors (see below), whose sum is σ = 59040. Its totient is φ = 49180.

The previous prime is 54101. The next prime is 54121. The reversal of 54109 is 90145.

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 54109 - 2³ = 54101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54101) 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, 2449 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (14760).

2⁵⁴¹⁰⁹ is an apocalyptic number.

It is an amenable number.

54109 is a deficient number, since it is larger than the sum of its proper divisors (4931).

54109 is a wasteful number, since it uses less digits than its factorization.

54109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 54109 is about 232.6134131988. The cubic root of 54109 is about 37.8230461442.

Adding to 54109 its product of nonzero digits (180), we get a square (54289 = 233²).

It can be divided in two parts, 54 and 109, that multiplied together give a triangular number (5886 = T₁₀₈).

The spelling of 54109 in words is "fifty-four thousand, one hundred nine".