257903 has 2 divisors, whose sum is σ = 257904. Its totient is φ = 257902.
The previous prime is 257893. The next prime is 257921. The reversal of 257903 is 309752.
257903 is nontrivially palindromic in base 13.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-257903 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (257953) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128951 + 128952.
It is an arithmetic number, because the mean of its divisors is an integer number (128952).
2257903 is an apocalyptic number.
257903 is a deficient number, since it is larger than the sum of its proper divisors (1).
257903 is an equidigital number, since it uses as much as digits as its factorization.
257903 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 1890, while the sum is 26.
The square root of 257903 is about 507.8415107098. The cubic root of 257903 is about 63.6529884208.
The spelling of 257903 in words is "two hundred fifty-seven thousand, nine hundred three".
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