853903 has 2 divisors, whose sum is σ = 853904. Its totient is φ = 853902.

The previous prime is 853901. The next prime is 853913. The reversal of 853903 is 309358.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 853903 - 2¹ = 853901 is a prime.

Together with 853901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853901) 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, 426951 + 426952.

It is an arithmetic number, because the mean of its divisors is an integer number (426952).

2⁸⁵³⁹⁰³ is an apocalyptic number.

853903 is a deficient number, since it is larger than the sum of its proper divisors (1).

853903 is an equidigital number, since it uses as much as digits as its factorization.

853903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 853903 is about 924.0687203883. The cubic root of 853903 is about 94.8715901284.

The spelling of 853903 in words is "eight hundred fifty-three thousand, nine hundred three".