50905 has 4 divisors (see below), whose sum is σ = 61092. Its totient is φ = 40720.

The previous prime is 50893. The next prime is 50909.

50905 is nontrivially palindromic in base 10.

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 24336 + 26569 = 156^2 + 163^2 .

It is not a de Polignac number, because 50905 - 2⁵ = 50873 is a prime.

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

It is a Duffinian number.

50905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (50909) 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, 5086 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (15273).

2⁵⁰⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

50905 is a deficient number, since it is larger than the sum of its proper divisors (10187).

50905 is a wasteful number, since it uses less digits than its factorization.

50905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10186.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 50905 is about 225.6213642366. The cubic root of 50905 is about 37.0612571826.

The spelling of 50905 in words is "fifty thousand, nine hundred five".