257683061 has 2 divisors, whose sum is σ = 257683062. Its totient is φ = 257683060.

The previous prime is 257683057. The next prime is 257683079. The reversal of 257683061 is 160386752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236236900 + 21446161 = 15370^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 257683061 - 2² = 257683057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257683051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128841530 + 128841531.

It is an arithmetic number, because the mean of its divisors is an integer number (128841531).

Almost surely, 2^257683061 is an apocalyptic number.

It is an amenable number.

257683061 is a deficient number, since it is larger than the sum of its proper divisors (1).

257683061 is an equidigital number, since it uses as much as digits as its factorization.

257683061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 257683061 is about 16052.5094922881. The cubic root of 257683061 is about 636.3488890775.

The spelling of 257683061 in words is "two hundred fifty-seven million, six hundred eighty-three thousand, sixty-one".