126686407697 has 2 divisors, whose sum is σ = 126686407698. Its totient is φ = 126686407696.

The previous prime is 126686407667. The next prime is 126686407699. The reversal of 126686407697 is 796704686621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124690909456 + 1995498241 = 353116^2 + 44671^2 .

It is an emirp because it is prime and its reverse (796704686621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126686407697 - 2⁶ = 126686407633 is a prime.

Together with 126686407699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126686407699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63343203848 + 63343203849.

It is an arithmetic number, because the mean of its divisors is an integer number (63343203849).

Almost surely, 2^126686407697 is an apocalyptic number.

It is an amenable number.

126686407697 is a deficient number, since it is larger than the sum of its proper divisors (1).

126686407697 is an equidigital number, since it uses as much as digits as its factorization.

126686407697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 126686407697 in words is "one hundred twenty-six billion, six hundred eighty-six million, four hundred seven thousand, six hundred ninety-seven".