55903 has 2 divisors, whose sum is σ = 55904. Its totient is φ = 55902.

The previous prime is 55901. The next prime is 55921. The reversal of 55903 is 30955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55903 - 2¹ = 55901 is a prime.

Together with 55901, it forms a pair of twin primes.

55903 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27951 + 27952.

It is an arithmetic number, because the mean of its divisors is an integer number (27952).

2⁵⁵⁹⁰³ is an apocalyptic number.

55903 is a deficient number, since it is larger than the sum of its proper divisors (1).

55903 is an equidigital number, since it uses as much as digits as its factorization.

55903 is an odious number, because the sum of its binary digits is odd.

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

The square root of 55903 is about 236.4381525896. The cubic root of 55903 is about 38.2365210884.

The spelling of 55903 in words is "fifty-five thousand, nine hundred three".