257383087 has 8 divisors (see below), whose sum is σ = 289233504. Its totient is φ = 227254368.

The previous prime is 257383081. The next prime is 257383097. The reversal of 257383087 is 780383752.

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 257383087 - 2¹¹ = 257381039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257383081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430108 + ... + 430705.

It is an arithmetic number, because the mean of its divisors is an integer number (36154188).

Almost surely, 2^257383087 is an apocalyptic number.

257383087 is a deficient number, since it is larger than the sum of its proper divisors (31850417).

257383087 is a wasteful number, since it uses less digits than its factorization.

257383087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860849.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 257383087 is about 16043.1632479384. The cubic root of 257383087 is about 636.1018643784.

The spelling of 257383087 in words is "two hundred fifty-seven million, three hundred eighty-three thousand, eighty-seven".