257441189 has 2 divisors, whose sum is σ = 257441190. Its totient is φ = 257441188.

The previous prime is 257441159. The next prime is 257441213. The reversal of 257441189 is 981144752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143592289 + 113848900 = 11983^2 + 10670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257441189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257441159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128720594 + 128720595.

It is an arithmetic number, because the mean of its divisors is an integer number (128720595).

Almost surely, 2^257441189 is an apocalyptic number.

It is an amenable number.

257441189 is a deficient number, since it is larger than the sum of its proper divisors (1).

257441189 is an equidigital number, since it uses as much as digits as its factorization.

257441189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 257441189 is about 16044.9739482493. The cubic root of 257441189 is about 636.1497256038.

The spelling of 257441189 in words is "two hundred fifty-seven million, four hundred forty-one thousand, one hundred eighty-nine".