257249063 has 2 divisors, whose sum is σ = 257249064. Its totient is φ = 257249062.

The previous prime is 257249059. The next prime is 257249093. The reversal of 257249063 is 360942752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257249063 - 2² = 257249059 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257249093) 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, 128624531 + 128624532.

It is an arithmetic number, because the mean of its divisors is an integer number (128624532).

Almost surely, 2^257249063 is an apocalyptic number.

257249063 is a deficient number, since it is larger than the sum of its proper divisors (1).

257249063 is an equidigital number, since it uses as much as digits as its factorization.

257249063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 257249063 is about 16038.9857222955. The cubic root of 257249063 is about 635.9914353171.

The spelling of 257249063 in words is "two hundred fifty-seven million, two hundred forty-nine thousand, sixty-three".