257339530697 has 2 divisors, whose sum is σ = 257339530698. Its totient is φ = 257339530696.

The previous prime is 257339530649. The next prime is 257339530717. The reversal of 257339530697 is 796035933752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194484528016 + 62855002681 = 441004^2 + 250709^2 .

It is a cyclic number.

It is not a de Polignac number, because 257339530697 - 2¹⁰ = 257339529673 is a prime.

It is not a weakly prime, because it can be changed into another prime (257339500697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128669765348 + 128669765349.

It is an arithmetic number, because the mean of its divisors is an integer number (128669765349).

Almost surely, 2^257339530697 is an apocalyptic number.

It is an amenable number.

257339530697 is a deficient number, since it is larger than the sum of its proper divisors (1).

257339530697 is an equidigital number, since it uses as much as digits as its factorization.

257339530697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32148900, while the sum is 59.

The spelling of 257339530697 in words is "two hundred fifty-seven billion, three hundred thirty-nine million, five hundred thirty thousand, six hundred ninety-seven".