257450617 has 2 divisors, whose sum is σ = 257450618. Its totient is φ = 257450616.

The previous prime is 257450579. The next prime is 257450623. The reversal of 257450617 is 716054752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206813161 + 50637456 = 14381^2 + 7116^2 .

It is a cyclic number.

It is not a de Polignac number, because 257450617 - 2⁷ = 257450489 is a prime.

It is not a weakly prime, because it can be changed into another prime (257450647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128725308 + 128725309.

It is an arithmetic number, because the mean of its divisors is an integer number (128725309).

Almost surely, 2^257450617 is an apocalyptic number.

It is an amenable number.

257450617 is a deficient number, since it is larger than the sum of its proper divisors (1).

257450617 is an equidigital number, since it uses as much as digits as its factorization.

257450617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 257450617 is about 16045.2677447277. The cubic root of 257450617 is about 636.1574911916.

The spelling of 257450617 in words is "two hundred fifty-seven million, four hundred fifty thousand, six hundred seventeen".