913731807257 has 2 divisors, whose sum is σ = 913731807258. Its totient is φ = 913731807256.

The previous prime is 913731807239. The next prime is 913731807299. The reversal of 913731807257 is 752708137319.

913731807257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527779002256 + 385952805001 = 726484^2 + 621251^2 .

It is a cyclic number.

It is not a de Polignac number, because 913731807257 - 2¹⁰ = 913731806233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 913731807199 and 913731807208.

It is not a weakly prime, because it can be changed into another prime (913731804257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456865903628 + 456865903629.

It is an arithmetic number, because the mean of its divisors is an integer number (456865903629).

Almost surely, 2^913731807257 is an apocalyptic number.

It is an amenable number.

913731807257 is a deficient number, since it is larger than the sum of its proper divisors (1).

913731807257 is an equidigital number, since it uses as much as digits as its factorization.

913731807257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 913731807257 in words is "nine hundred thirteen billion, seven hundred thirty-one million, eight hundred seven thousand, two hundred fifty-seven".