53906 has 4 divisors (see below), whose sum is σ = 80862. Its totient is φ = 26952.

The previous prime is 53899. The next prime is 53917. The reversal of 53906 is 60935.

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

It can be written as a sum of positive squares in only one way, i.e., 42025 + 11881 = 205^2 + 109^2 .

It is a nialpdrome in base 5.

It is an unprimeable number.

53906 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 13475 + ... + 13478.

2⁵³⁹⁰⁶ is an apocalyptic number.

53906 is a deficient number, since it is larger than the sum of its proper divisors (26956).

53906 is a wasteful number, since it uses less digits than its factorization.

53906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26955.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 53906 is about 232.1766568801. The cubic root of 53906 is about 37.7756867996.

It can be divided in two parts, 53 and 906, that added together give a palindrome (959).

The spelling of 53906 in words is "fifty-three thousand, nine hundred six".