257758463 has 2 divisors, whose sum is σ = 257758464. Its totient is φ = 257758462.

The previous prime is 257758453. The next prime is 257758477. The reversal of 257758463 is 364857752.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257758463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257758453) 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, 128879231 + 128879232.

It is an arithmetic number, because the mean of its divisors is an integer number (128879232).

Almost surely, 2^257758463 is an apocalyptic number.

257758463 is a deficient number, since it is larger than the sum of its proper divisors (1).

257758463 is an equidigital number, since it uses as much as digits as its factorization.

257758463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 47.

The square root of 257758463 is about 16054.8579252512. The cubic root of 257758463 is about 636.4109514931.

The spelling of 257758463 in words is "two hundred fifty-seven million, seven hundred fifty-eight thousand, four hundred sixty-three".