50909 has 2 divisors, whose sum is σ = 50910. Its totient is φ = 50908.

The previous prime is 50893. The next prime is 50923. The reversal of 50909 is 90905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38809 + 12100 = 197^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 50909 - 2⁴ = 50893 is a prime.

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

50909 is a modest number, since divided by 909 gives 5 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25454 + 25455.

It is an arithmetic number, because the mean of its divisors is an integer number (25455).

2⁵⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

50909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50909 is an equidigital number, since it uses as much as digits as its factorization.

50909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 50909 is about 225.6302284713. The cubic root of 50909 is about 37.0622278872.

It can be divided in two parts, 50 and 909, that added together give a palindrome (959).

The spelling of 50909 in words is "fifty thousand, nine hundred nine".