257848489 has 2 divisors, whose sum is σ = 257848490. Its totient is φ = 257848488.

The previous prime is 257848477. The next prime is 257848517. The reversal of 257848489 is 984848752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137288089 + 120560400 = 11717^2 + 10980^2 .

It is a cyclic number.

It is not a de Polignac number, because 257848489 - 2⁵ = 257848457 is a prime.

It is not a weakly prime, because it can be changed into another prime (257848189) 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, 128924244 + 128924245.

It is an arithmetic number, because the mean of its divisors is an integer number (128924245).

Almost surely, 2^257848489 is an apocalyptic number.

It is an amenable number.

257848489 is a deficient number, since it is larger than the sum of its proper divisors (1).

257848489 is an equidigital number, since it uses as much as digits as its factorization.

257848489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5160960, while the sum is 55.

The square root of 257848489 is about 16057.6613801637. The cubic root of 257848489 is about 636.4850348846.

The spelling of 257848489 in words is "two hundred fifty-seven million, eight hundred forty-eight thousand, four hundred eighty-nine".