257489459 has 2 divisors, whose sum is σ = 257489460. Its totient is φ = 257489458.

The previous prime is 257489447. The next prime is 257489473. The reversal of 257489459 is 954984752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257489459 - 2⁴ = 257489443 is a prime.

It is a super-2 number, since 2×257489459² = 132601642992225362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257489459.

It is not a weakly prime, because it can be changed into another prime (257488459) 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, 128744729 + 128744730.

It is an arithmetic number, because the mean of its divisors is an integer number (128744730).

Almost surely, 2^257489459 is an apocalyptic number.

257489459 is a deficient number, since it is larger than the sum of its proper divisors (1).

257489459 is an equidigital number, since it uses as much as digits as its factorization.

257489459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 53.

The square root of 257489459 is about 16046.4780871068. The cubic root of 257489459 is about 636.1894822934.

The spelling of 257489459 in words is "two hundred fifty-seven million, four hundred eighty-nine thousand, four hundred fifty-nine".