257893943 has 4 divisors (see below), whose sum is σ = 257974080. Its totient is φ = 257813808.

The previous prime is 257893931. The next prime is 257893949. The reversal of 257893943 is 349398752.

It is a happy number.

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 257893943 - 2⁶ = 257893879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257893891 and 257893900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257893949) 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, 35030 + ... + 41747.

It is an arithmetic number, because the mean of its divisors is an integer number (64493520).

Almost surely, 2^257893943 is an apocalyptic number.

257893943 is a deficient number, since it is larger than the sum of its proper divisors (80137).

257893943 is an equidigital number, since it uses as much as digits as its factorization.

257893943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80136.

The product of its digits is 1632960, while the sum is 50.

The square root of 257893943 is about 16059.0766546523. The cubic root of 257893943 is about 636.5224329332.

The spelling of 257893943 in words is "two hundred fifty-seven million, eight hundred ninety-three thousand, nine hundred forty-three".