257385703 has 4 divisors (see below), whose sum is σ = 257582160. Its totient is φ = 257189248.

The previous prime is 257385683. The next prime is 257385719. The reversal of 257385703 is 307583752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257385703 - 2¹⁷ = 257254631 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257385743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96250 + ... + 98887.

It is an arithmetic number, because the mean of its divisors is an integer number (64395540).

Almost surely, 2^257385703 is an apocalyptic number.

257385703 is a deficient number, since it is larger than the sum of its proper divisors (196457).

257385703 is a wasteful number, since it uses less digits than its factorization.

257385703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196456.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 257385703 is about 16043.2447777873. The cubic root of 257385703 is about 636.1040194499.

The spelling of 257385703 in words is "two hundred fifty-seven million, three hundred eighty-five thousand, seven hundred three".