257795143 has 2 divisors, whose sum is σ = 257795144. Its totient is φ = 257795142.

The previous prime is 257795119. The next prime is 257795179. The reversal of 257795143 is 341597752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257795143 - 2⁹ = 257794631 is a prime.

It is a super-3 number, since 3×257795143³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257795143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257795443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128897571 + 128897572.

It is an arithmetic number, because the mean of its divisors is an integer number (128897572).

Almost surely, 2^257795143 is an apocalyptic number.

257795143 is a deficient number, since it is larger than the sum of its proper divisors (1).

257795143 is an equidigital number, since it uses as much as digits as its factorization.

257795143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 43.

The square root of 257795143 is about 16056.0002179870. Note that the first 3 decimals coincide. The cubic root of 257795143 is about 636.4411379529.

The spelling of 257795143 in words is "two hundred fifty-seven million, seven hundred ninety-five thousand, one hundred forty-three".