257906027 has 2 divisors, whose sum is σ = 257906028. Its totient is φ = 257906026.

The previous prime is 257905951. The next prime is 257906029. The reversal of 257906027 is 720609752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257906027 - 2¹⁶ = 257840491 is a prime.

Together with 257906029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257906029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128953013 + 128953014.

It is an arithmetic number, because the mean of its divisors is an integer number (128953014).

Almost surely, 2^257906027 is an apocalyptic number.

257906027 is a deficient number, since it is larger than the sum of its proper divisors (1).

257906027 is an equidigital number, since it uses as much as digits as its factorization.

257906027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 257906027 is about 16059.4528860730. The cubic root of 257906027 is about 636.5323745095.

The spelling of 257906027 in words is "two hundred fifty-seven million, nine hundred six thousand, twenty-seven".