257467986697 has 2 divisors, whose sum is σ = 257467986698. Its totient is φ = 257467986696.

The previous prime is 257467986661. The next prime is 257467986733. The reversal of 257467986697 is 796689764752.

It is a balanced prime because it is at equal distance from previous prime (257467986661) and next prime (257467986733).

It can be written as a sum of positive squares in only one way, i.e., 198008090361 + 59459896336 = 444981^2 + 243844^2 .

It is a cyclic number.

It is not a de Polignac number, because 257467986697 - 2¹¹ = 257467984649 is a prime.

It is not a weakly prime, because it can be changed into another prime (257467986617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128733993348 + 128733993349.

It is an arithmetic number, because the mean of its divisors is an integer number (128733993349).

Almost surely, 2^257467986697 is an apocalyptic number.

It is an amenable number.

257467986697 is a deficient number, since it is larger than the sum of its proper divisors (1).

257467986697 is an equidigital number, since it uses as much as digits as its factorization.

257467986697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920360960, while the sum is 76.

The spelling of 257467986697 in words is "two hundred fifty-seven billion, four hundred sixty-seven million, nine hundred eighty-six thousand, six hundred ninety-seven".