523903 has 2 divisors, whose sum is σ = 523904. Its totient is φ = 523902.

The previous prime is 523877. The next prime is 523907. The reversal of 523903 is 309325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523903 - 2¹⁷ = 392831 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261951 + 261952.

It is an arithmetic number, because the mean of its divisors is an integer number (261952).

2⁵²³⁹⁰³ is an apocalyptic number.

523903 is a deficient number, since it is larger than the sum of its proper divisors (1).

523903 is an equidigital number, since it uses as much as digits as its factorization.

523903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 523903 is about 723.8114395338. The cubic root of 523903 is about 80.6152048273.

The spelling of 523903 in words is "five hundred twenty-three thousand, nine hundred three".