257383 has 8 divisors (see below), whose sum is σ = 298368. Its totient is φ = 217464.

The previous prime is 257381. The next prime is 257399. The reversal of 257383 is 383752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257383 - 2¹ = 257381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (37296).

2²⁵⁷³⁸³ is an apocalyptic number.

257383 is a deficient number, since it is larger than the sum of its proper divisors (40985).

257383 is an equidigital number, since it uses as much as digits as its factorization.

257383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533.

The product of its digits is 5040, while the sum is 28.

The square root of 257383 is about 507.3292816308. The cubic root of 257383 is about 63.6101792707.

The spelling of 257383 in words is "two hundred fifty-seven thousand, three hundred eighty-three".