257675497 has 2 divisors, whose sum is σ = 257675498. Its totient is φ = 257675496.

The previous prime is 257675461. The next prime is 257675519. The reversal of 257675497 is 794576752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182142016 + 75533481 = 13496^2 + 8691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257675497 is a prime.

It is not a weakly prime, because it can be changed into another prime (257675897) 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, 128837748 + 128837749.

It is an arithmetic number, because the mean of its divisors is an integer number (128837749).

Almost surely, 2^257675497 is an apocalyptic number.

It is an amenable number.

257675497 is a deficient number, since it is larger than the sum of its proper divisors (1).

257675497 is an equidigital number, since it uses as much as digits as its factorization.

257675497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3704400, while the sum is 52.

The square root of 257675497 is about 16052.2738887673. The cubic root of 257675497 is about 636.3426625784.

The spelling of 257675497 in words is "two hundred fifty-seven million, six hundred seventy-five thousand, four hundred ninety-seven".