54105439 has 4 divisors (see below), whose sum is σ = 54316224. Its totient is φ = 53894656.

The previous prime is 54105437. The next prime is 54105449. The reversal of 54105439 is 93450145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93450145 = 5 ⋅18690029.

It is a cyclic number.

It is not a de Polignac number, because 54105439 - 2¹ = 54105437 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54105439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54105437) 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, 105007 + ... + 105520.

It is an arithmetic number, because the mean of its divisors is an integer number (13579056).

Almost surely, 2^54105439 is an apocalyptic number.

54105439 is a deficient number, since it is larger than the sum of its proper divisors (210785).

54105439 is a wasteful number, since it uses less digits than its factorization.

54105439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210784.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 54105439 is about 7355.6399449674. The cubic root of 54105439 is about 378.2221639428. Note that the first 3 decimals are identical.

The spelling of 54105439 in words is "fifty-four million, one hundred five thousand, four hundred thirty-nine".