257395123 has 2 divisors, whose sum is σ = 257395124. Its totient is φ = 257395122.

The previous prime is 257395081. The next prime is 257395183. The reversal of 257395123 is 321593752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257395123 - 2¹³ = 257386931 is a prime.

It is not a weakly prime, because it can be changed into another prime (257395183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128697561 + 128697562.

It is an arithmetic number, because the mean of its divisors is an integer number (128697562).

Almost surely, 2^257395123 is an apocalyptic number.

257395123 is a deficient number, since it is larger than the sum of its proper divisors (1).

257395123 is an equidigital number, since it uses as much as digits as its factorization.

257395123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 257395123 is about 16043.5383566095. The cubic root of 257395123 is about 636.1117795634. Note that the first 3 decimals are identical.

The spelling of 257395123 in words is "two hundred fifty-seven million, three hundred ninety-five thousand, one hundred twenty-three".