53909 has 8 divisors (see below), whose sum is σ = 58368. Its totient is φ = 49680.

The previous prime is 53899. The next prime is 53917. The reversal of 53909 is 90935.

53909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53909 - 2⁸ = 53653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (7296).

2⁵³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

53909 is a deficient number, since it is larger than the sum of its proper divisors (4459).

53909 is a wasteful number, since it uses less digits than its factorization.

53909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 53909 is about 232.1831173880. The cubic root of 53909 is about 37.7763875562.

Adding to 53909 its sum of digits (26), we get a palindrome (53935).

The spelling of 53909 in words is "fifty-three thousand, nine hundred nine".