53905 has 4 divisors (see below), whose sum is σ = 64692. Its totient is φ = 43120.

The previous prime is 53899. The next prime is 53917. The reversal of 53905 is 50935.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17424 + 36481 = 132^2 + 191^2 .

It is not a de Polignac number, because 53905 - 2³ = 53897 is a prime.

It is a Smith number, since the sum of its digits (22) 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 nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5386 + ... + 5395.

It is an arithmetic number, because the mean of its divisors is an integer number (16173).

2⁵³⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

53905 is a deficient number, since it is larger than the sum of its proper divisors (10787).

53905 is a wasteful number, since it uses less digits than its factorization.

53905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 53905 is about 232.1745033375. The cubic root of 53905 is about 37.7754532082.

The spelling of 53905 in words is "fifty-three thousand, nine hundred five".