257030671 has 2 divisors, whose sum is σ = 257030672. Its totient is φ = 257030670.

The previous prime is 257030663. The next prime is 257030677. The reversal of 257030671 is 176030752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257030671 - 2³ = 257030663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257030677) 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, 128515335 + 128515336.

It is an arithmetic number, because the mean of its divisors is an integer number (128515336).

Almost surely, 2^257030671 is an apocalyptic number.

257030671 is a deficient number, since it is larger than the sum of its proper divisors (1).

257030671 is an equidigital number, since it uses as much as digits as its factorization.

257030671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 257030671 is about 16032.1761155496. The cubic root of 257030671 is about 635.8114090504.

The spelling of 257030671 in words is "two hundred fifty-seven million, thirty thousand, six hundred seventy-one".